diff --git a/main.py b/main.py
index 39942fb..624d2bf 100644
--- a/main.py
+++ b/main.py
@@ -23,20 +23,24 @@ from urllib.parse import urlparse
 from openai import OpenAI
 
 from phone_agent import PhoneAgent
-from phone_agent.adb import ADBConnection, list_devices
 from phone_agent.agent import AgentConfig
 from phone_agent.config.apps import list_supported_apps
+from phone_agent.config.apps_harmonyos import list_supported_apps as list_harmonyos_apps
+from phone_agent.device_factory import DeviceType, get_device_factory, set_device_type
 from phone_agent.model import ModelConfig
 
 
-def check_system_requirements() -> bool:
+def check_system_requirements(device_type: DeviceType = DeviceType.ADB) -> bool:
     """
     Check system requirements before running the agent.
 
     Checks:
-    1. ADB tools installed
+    1. ADB/HDC tools installed
     2. At least one device connected
-    3. ADB Keyboard installed on the device
+    3. ADB Keyboard installed on the device (for ADB only)
+
+    Args:
+        device_type: Type of device tool (ADB or HDC).
 
     Returns:
         True if all checks pass, False otherwise.
@@ -46,38 +50,47 @@ def check_system_requirements() -> bool:
 
     all_passed = True
 
-    # Check 1: ADB installed
-    print("1. Checking ADB installation...", end=" ")
-    if shutil.which("adb") is None:
+    # Determine tool name and command
+    tool_name = "ADB" if device_type == DeviceType.ADB else "HDC"
+    tool_cmd = "adb" if device_type == DeviceType.ADB else "hdc"
+
+    # Check 1: Tool installed
+    print(f"1. Checking {tool_name} installation...", end=" ")
+    if shutil.which(tool_cmd) is None:
         print("❌ FAILED")
-        print("   Error: ADB is not installed or not in PATH.")
-        print("   Solution: Install Android SDK Platform Tools:")
-        print("     - macOS: brew install android-platform-tools")
-        print("     - Linux: sudo apt install android-tools-adb")
-        print(
-            "     - Windows: Download from https://developer.android.com/studio/releases/platform-tools"
-        )
+        print(f"   Error: {tool_name} is not installed or not in PATH.")
+        print(f"   Solution: Install {tool_name}:")
+        if device_type == DeviceType.ADB:
+            print("     - macOS: brew install android-platform-tools")
+            print("     - Linux: sudo apt install android-tools-adb")
+            print(
+                "     - Windows: Download from https://developer.android.com/studio/releases/platform-tools"
+            )
+        else:
+            print("     - Download from HarmonyOS SDK or https://gitee.com/openharmony/docs")
+            print("     - Add to PATH environment variable")
         all_passed = False
     else:
-        # Double check by running adb version
+        # Double check by running version command
         try:
+            version_cmd = [tool_cmd, "version"] if device_type == DeviceType.ADB else [tool_cmd, "-v"]
             result = subprocess.run(
-                ["adb", "version"], capture_output=True, text=True, timeout=10
+                version_cmd, capture_output=True, text=True, timeout=10
             )
             if result.returncode == 0:
                 version_line = result.stdout.strip().split("\n")[0]
                 print(f"✅ OK ({version_line})")
             else:
                 print("❌ FAILED")
-                print("   Error: ADB command failed to run.")
+                print(f"   Error: {tool_name} command failed to run.")
                 all_passed = False
         except FileNotFoundError:
             print("❌ FAILED")
-            print("   Error: ADB command not found.")
+            print(f"   Error: {tool_name} command not found.")
             all_passed = False
         except subprocess.TimeoutExpired:
             print("❌ FAILED")
-            print("   Error: ADB command timed out.")
+            print(f"   Error: {tool_name} command timed out.")
             all_passed = False
 
     # If ADB is not installed, skip remaining checks
@@ -89,27 +102,42 @@ def check_system_requirements() -> bool:
     # Check 2: Device connected
     print("2. Checking connected devices...", end=" ")
     try:
-        result = subprocess.run(
-            ["adb", "devices"], capture_output=True, text=True, timeout=10
-        )
-        lines = result.stdout.strip().split("\n")
-        # Filter out header and empty lines, look for 'device' status
-        devices = [line for line in lines[1:] if line.strip() and "\tdevice" in line]
+        if device_type == DeviceType.ADB:
+            result = subprocess.run(
+                ["adb", "devices"], capture_output=True, text=True, timeout=10
+            )
+            lines = result.stdout.strip().split("\n")
+            # Filter out header and empty lines, look for 'device' status
+            devices = [line for line in lines[1:] if line.strip() and "\tdevice" in line]
+        else:  # HDC
+            result = subprocess.run(
+                ["hdc", "list", "targets"], capture_output=True, text=True, timeout=10
+            )
+            lines = result.stdout.strip().split("\n")
+            devices = [line for line in lines if line.strip()]
 
         if not devices:
             print("❌ FAILED")
             print("   Error: No devices connected.")
             print("   Solution:")
-            print("     1. Enable USB debugging on your Android device")
-            print("     2. Connect via USB and authorize the connection")
-            print("     3. Or connect remotely: python main.py --connect <ip>:<port>")
+            if device_type == DeviceType.ADB:
+                print("     1. Enable USB debugging on your Android device")
+                print("     2. Connect via USB and authorize the connection")
+                print("     3. Or connect remotely: python main.py --connect <ip>:<port>")
+            else:
+                print("     1. Enable USB debugging on your HarmonyOS device")
+                print("     2. Connect via USB and authorize the connection")
+                print("     3. Or connect remotely: python main.py --device-type hdc --connect <ip>:<port>")
             all_passed = False
         else:
-            device_ids = [d.split("\t")[0] for d in devices]
+            if device_type == DeviceType.ADB:
+                device_ids = [d.split("\t")[0] for d in devices]
+            else:
+                device_ids = [d.strip() for d in devices]
             print(f"✅ OK ({len(devices)} device(s): {', '.join(device_ids)})")
     except subprocess.TimeoutExpired:
         print("❌ FAILED")
-        print("   Error: ADB command timed out.")
+        print(f"   Error: {tool_name} command timed out.")
         all_passed = False
     except Exception as e:
         print("❌ FAILED")
@@ -122,40 +150,45 @@ def check_system_requirements() -> bool:
         print("❌ System check failed. Please fix the issues above.")
         return False
 
-    # Check 3: ADB Keyboard installed
-    print("3. Checking ADB Keyboard...", end=" ")
-    try:
-        result = subprocess.run(
-            ["adb", "shell", "ime", "list", "-s"],
-            capture_output=True,
-            text=True,
-            timeout=10,
-        )
-        ime_list = result.stdout.strip()
+    # Check 3: ADB Keyboard installed (only for ADB)
+    if device_type == DeviceType.ADB:
+        print("3. Checking ADB Keyboard...", end=" ")
+        try:
+            result = subprocess.run(
+                ["adb", "shell", "ime", "list", "-s"],
+                capture_output=True,
+                text=True,
+                timeout=10,
+            )
+            ime_list = result.stdout.strip()
 
-        if "com.android.adbkeyboard/.AdbIME" in ime_list:
-            print("✅ OK")
-        else:
+            if "com.android.adbkeyboard/.AdbIME" in ime_list:
+                print("✅ OK")
+            else:
+                print("❌ FAILED")
+                print("   Error: ADB Keyboard is not installed on the device.")
+                print("   Solution:")
+                print("     1. Download ADB Keyboard APK from:")
+                print(
+                    "        https://github.com/senzhk/ADBKeyBoard/blob/master/ADBKeyboard.apk"
+                )
+                print("     2. Install it on your device: adb install ADBKeyboard.apk")
+                print(
+                    "     3. Enable it in Settings > System > Languages & Input > Virtual Keyboard"
+                )
+                all_passed = False
+        except subprocess.TimeoutExpired:
             print("❌ FAILED")
-            print("   Error: ADB Keyboard is not installed on the device.")
-            print("   Solution:")
-            print("     1. Download ADB Keyboard APK from:")
-            print(
-                "        https://github.com/senzhk/ADBKeyBoard/blob/master/ADBKeyboard.apk"
-            )
-            print("     2. Install it on your device: adb install ADBKeyboard.apk")
-            print(
-                "     3. Enable it in Settings > System > Languages & Input > Virtual Keyboard"
-            )
+            print("   Error: ADB command timed out.")
             all_passed = False
-    except subprocess.TimeoutExpired:
-        print("❌ FAILED")
-        print("   Error: ADB command timed out.")
-        all_passed = False
-    except Exception as e:
-        print("❌ FAILED")
-        print(f"   Error: {e}")
-        all_passed = False
+        except Exception as e:
+            print("❌ FAILED")
+            print(f"   Error: {e}")
+            all_passed = False
+    else:
+        # For HDC, skip keyboard check as it uses different input method
+        print("3. Skipping keyboard check for HarmonyOS...", end=" ")
+        print("✅ OK (using native input)")
 
     print("-" * 50)
 
@@ -368,6 +401,14 @@ Examples:
         help="Language for system prompt (cn or en, default: cn)",
     )
 
+    parser.add_argument(
+        "--device-type",
+        type=str,
+        choices=["adb", "hdc"],
+        default=os.getenv("PHONE_AGENT_DEVICE_TYPE", "adb"),
+        help="Device type: adb for Android, hdc for HarmonyOS (default: adb)",
+    )
+
     parser.add_argument(
         "task",
         nargs="?",
@@ -385,11 +426,13 @@ def handle_device_commands(args) -> bool:
     Returns:
         True if a device command was handled (should exit), False otherwise.
     """
-    conn = ADBConnection()
+    device_factory = get_device_factory()
+    ConnectionClass = device_factory.get_connection_class()
+    conn = ConnectionClass()
 
     # Handle --list-devices
     if args.list_devices:
-        devices = list_devices()
+        devices = device_factory.list_devices()
         if not devices:
             print("No devices connected.")
         else:
@@ -452,10 +495,25 @@ def main():
     """Main entry point."""
     args = parse_args()
 
+    # Set device type globally based on args
+    device_type = DeviceType.ADB if args.device_type == "adb" else DeviceType.HDC
+    set_device_type(device_type)
+
+    # Enable HDC verbose mode if using HDC
+    if device_type == DeviceType.HDC:
+        from phone_agent.hdc import set_hdc_verbose
+        set_hdc_verbose(True)
+
     # Handle --list-apps (no system check needed)
     if args.list_apps:
-        print("Supported apps:")
-        for app in sorted(list_supported_apps()):
+        if device_type == DeviceType.HDC:
+            print("Supported HarmonyOS apps:")
+            apps = list_harmonyos_apps()
+        else:
+            print("Supported Android apps:")
+            apps = list_supported_apps()
+
+        for app in apps:
             print(f"  - {app}")
         return
 
@@ -464,7 +522,7 @@ def main():
         return
 
     # Run system requirements check before proceeding
-    if not check_system_requirements():
+    if not check_system_requirements(device_type):
         sys.exit(1)
 
     # Check model API connectivity and model availability
@@ -500,9 +558,11 @@ def main():
     print(f"Base URL: {model_config.base_url}")
     print(f"Max Steps: {agent_config.max_steps}")
     print(f"Language: {agent_config.lang}")
+    print(f"Device Type: {args.device_type.upper()}")
 
     # Show device info
-    devices = list_devices()
+    device_factory = get_device_factory()
+    devices = device_factory.list_devices()
     if agent_config.device_id:
         print(f"Device: {agent_config.device_id}")
     elif devices:
diff --git a/phone_agent/actions/handler.py b/phone_agent/actions/handler.py
index 32ab4ff..0bef1c3 100644
--- a/phone_agent/actions/handler.py
+++ b/phone_agent/actions/handler.py
@@ -2,24 +2,13 @@
 
 import ast
 import re
+import subprocess
 import time
 from dataclasses import dataclass
 from typing import Any, Callable
 
-from phone_agent.adb import (
-    back,
-    clear_text,
-    detect_and_set_adb_keyboard,
-    double_tap,
-    home,
-    launch_app,
-    long_press,
-    restore_keyboard,
-    swipe,
-    tap,
-    type_text,
-)
 from phone_agent.config.timing import TIMING_CONFIG
+from phone_agent.device_factory import get_device_factory
 
 
 @dataclass
@@ -132,7 +121,8 @@ class ActionHandler:
         if not app_name:
             return ActionResult(False, False, "No app name specified")
 
-        success = launch_app(app_name, self.device_id)
+        device_factory = get_device_factory()
+        success = device_factory.launch_app(app_name, self.device_id)
         if success:
             return ActionResult(True, False)
         return ActionResult(False, False, f"App not found: {app_name}")
@@ -154,26 +144,30 @@ class ActionHandler:
                     message="User cancelled sensitive operation",
                 )
 
-        tap(x, y, self.device_id)
+        device_factory = get_device_factory()
+        device_factory.tap(x, y, self.device_id)
         return ActionResult(True, False)
 
     def _handle_type(self, action: dict, width: int, height: int) -> ActionResult:
         """Handle text input action."""
         text = action.get("text", "")
 
+        device_factory = get_device_factory()
+
         # Switch to ADB keyboard
-        original_ime = detect_and_set_adb_keyboard(self.device_id)
+        original_ime = device_factory.detect_and_set_adb_keyboard(self.device_id)
         time.sleep(TIMING_CONFIG.action.keyboard_switch_delay)
 
         # Clear existing text and type new text
-        clear_text(self.device_id)
+        device_factory.clear_text(self.device_id)
         time.sleep(TIMING_CONFIG.action.text_clear_delay)
 
-        type_text(text, self.device_id)
+        # Handle multiline text by splitting on newlines
+        device_factory.type_text(text, self.device_id)
         time.sleep(TIMING_CONFIG.action.text_input_delay)
 
         # Restore original keyboard
-        restore_keyboard(original_ime, self.device_id)
+        device_factory.restore_keyboard(original_ime, self.device_id)
         time.sleep(TIMING_CONFIG.action.keyboard_restore_delay)
 
         return ActionResult(True, False)
@@ -189,17 +183,20 @@ class ActionHandler:
         start_x, start_y = self._convert_relative_to_absolute(start, width, height)
         end_x, end_y = self._convert_relative_to_absolute(end, width, height)
 
-        swipe(start_x, start_y, end_x, end_y, device_id=self.device_id)
+        device_factory = get_device_factory()
+        device_factory.swipe(start_x, start_y, end_x, end_y, device_id=self.device_id)
         return ActionResult(True, False)
 
     def _handle_back(self, action: dict, width: int, height: int) -> ActionResult:
         """Handle back button action."""
-        back(self.device_id)
+        device_factory = get_device_factory()
+        device_factory.back(self.device_id)
         return ActionResult(True, False)
 
     def _handle_home(self, action: dict, width: int, height: int) -> ActionResult:
         """Handle home button action."""
-        home(self.device_id)
+        device_factory = get_device_factory()
+        device_factory.home(self.device_id)
         return ActionResult(True, False)
 
     def _handle_double_tap(self, action: dict, width: int, height: int) -> ActionResult:
@@ -209,7 +206,8 @@ class ActionHandler:
             return ActionResult(False, False, "No element coordinates")
 
         x, y = self._convert_relative_to_absolute(element, width, height)
-        double_tap(x, y, self.device_id)
+        device_factory = get_device_factory()
+        device_factory.double_tap(x, y, self.device_id)
         return ActionResult(True, False)
 
     def _handle_long_press(self, action: dict, width: int, height: int) -> ActionResult:
@@ -219,7 +217,8 @@ class ActionHandler:
             return ActionResult(False, False, "No element coordinates")
 
         x, y = self._convert_relative_to_absolute(element, width, height)
-        long_press(x, y, device_id=self.device_id)
+        device_factory = get_device_factory()
+        device_factory.long_press(x, y, device_id=self.device_id)
         return ActionResult(True, False)
 
     def _handle_wait(self, action: dict, width: int, height: int) -> ActionResult:
@@ -256,6 +255,68 @@ class ActionHandler:
         # This action signals that user input is needed
         return ActionResult(True, False, message="User interaction required")
 
+    def _send_keyevent(self, keycode: str) -> None:
+        """Send a keyevent to the device."""
+        from phone_agent.device_factory import DeviceType, get_device_factory
+        from phone_agent.hdc.connection import _run_hdc_command
+
+        device_factory = get_device_factory()
+
+        # Handle HDC devices with HarmonyOS-specific keyEvent command
+        if device_factory.device_type == DeviceType.HDC:
+            hdc_prefix = ["hdc", "-t", self.device_id] if self.device_id else ["hdc"]
+            
+            # Map common keycodes to HarmonyOS keyEvent codes
+            # KEYCODE_ENTER (66) -> 2054 (HarmonyOS Enter key code)
+            if keycode == "KEYCODE_ENTER" or keycode == "66":
+                _run_hdc_command(
+                    hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "2054"],
+                    capture_output=True,
+                    text=True,
+                )
+            else:
+                # For other keys, try to use the numeric code directly
+                # If keycode is a string like "KEYCODE_ENTER", convert it
+                try:
+                    # Try to extract numeric code from string or use as-is
+                    if keycode.startswith("KEYCODE_"):
+                        # For now, only handle ENTER, other keys may need mapping
+                        if "ENTER" in keycode:
+                            _run_hdc_command(
+                                hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "2054"],
+                                capture_output=True,
+                                text=True,
+                            )
+                        else:
+                            # Fallback to ADB-style command for unsupported keys
+                            subprocess.run(
+                                hdc_prefix + ["shell", "input", "keyevent", keycode],
+                                capture_output=True,
+                                text=True,
+                            )
+                    else:
+                        # Assume it's a numeric code
+                        _run_hdc_command(
+                            hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", str(keycode)],
+                            capture_output=True,
+                            text=True,
+                        )
+                except Exception:
+                    # Fallback to ADB-style command
+                    subprocess.run(
+                        hdc_prefix + ["shell", "input", "keyevent", keycode],
+                        capture_output=True,
+                        text=True,
+                    )
+        else:
+            # ADB devices use standard input keyevent command
+            cmd_prefix = ["adb", "-s", self.device_id] if self.device_id else ["adb"]
+            subprocess.run(
+                cmd_prefix + ["shell", "input", "keyevent", keycode],
+                capture_output=True,
+                text=True,
+            )
+
     @staticmethod
     def _default_confirmation(message: str) -> bool:
         """Default confirmation callback using console input."""
@@ -281,6 +342,7 @@ def parse_action(response: str) -> dict[str, Any]:
     Raises:
         ValueError: If the response cannot be parsed.
     """
+    print(f"Parsing action: {response}")
     try:
         response = response.strip()
         if response.startswith('do(action="Type"') or response.startswith(
@@ -292,6 +354,11 @@ def parse_action(response: str) -> dict[str, Any]:
         elif response.startswith("do"):
             # Use AST parsing instead of eval for safety
             try:
+                # Escape special characters (newlines, tabs, etc.) for valid Python syntax
+                response = response.replace('\n', '\\n')
+                response = response.replace('\r', '\\r')
+                response = response.replace('\t', '\\t')
+
                 tree = ast.parse(response, mode="eval")
                 if not isinstance(tree.body, ast.Call):
                     raise ValueError("Expected a function call")
diff --git a/phone_agent/adb/connection.py b/phone_agent/adb/connection.py
index 480b5a7..b723ca9 100644
--- a/phone_agent/adb/connection.py
+++ b/phone_agent/adb/connection.py
@@ -109,7 +109,7 @@ class ADBConnection:
             if address:
                 cmd.append(address)
 
-            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            result = subprocess.run(cmd, capture_output=True, text=True, encoding="utf-8", timeout=5)
 
             output = result.stdout + result.stderr
             return True, output.strip() or "Disconnected"
@@ -241,7 +241,7 @@ class ADBConnection:
                 cmd.extend(["-s", device_id])
             cmd.extend(["tcpip", str(port)])
 
-            result = subprocess.run(cmd, capture_output=True, text=True, timeout=10)
+            result = subprocess.run(cmd, capture_output=True, text=True, encoding="utf-8", timeout=10)
 
             output = result.stdout + result.stderr
 
@@ -270,7 +270,7 @@ class ADBConnection:
                 cmd.extend(["-s", device_id])
             cmd.extend(["shell", "ip", "route"])
 
-            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            result = subprocess.run(cmd, capture_output=True, text=True, encoding="utf-8", timeout=5)
 
             # Parse IP from route output
             for line in result.stdout.split("\n"):
@@ -286,6 +286,7 @@ class ADBConnection:
                 cmd[:-1] + ["shell", "ip", "addr", "show", "wlan0"],
                 capture_output=True,
                 text=True,
+                encoding="utf-8",
                 timeout=5,
             )
 
diff --git a/phone_agent/adb/device.py b/phone_agent/adb/device.py
index 1a081ad..995336a 100644
--- a/phone_agent/adb/device.py
+++ b/phone_agent/adb/device.py
@@ -22,9 +22,11 @@ def get_current_app(device_id: str | None = None) -> str:
     adb_prefix = _get_adb_prefix(device_id)
 
     result = subprocess.run(
-        adb_prefix + ["shell", "dumpsys", "window"], capture_output=True, text=True
+        adb_prefix + ["shell", "dumpsys", "window"], capture_output=True, text=True, encoding="utf-8"
     )
     output = result.stdout
+    if not output:
+        raise ValueError("No output from dumpsys window")
 
     # Parse window focus info
     for line in output.split("\n"):
diff --git a/phone_agent/agent.py b/phone_agent/agent.py
index b170316..3642791 100644
--- a/phone_agent/agent.py
+++ b/phone_agent/agent.py
@@ -7,8 +7,8 @@ from typing import Any, Callable
 
 from phone_agent.actions import ActionHandler
 from phone_agent.actions.handler import do, finish, parse_action
-from phone_agent.adb import get_current_app, get_screenshot
 from phone_agent.config import get_messages, get_system_prompt
+from phone_agent.device_factory import get_device_factory
 from phone_agent.model import ModelClient, ModelConfig
 from phone_agent.model.client import MessageBuilder
 
@@ -140,8 +140,9 @@ class PhoneAgent:
         self._step_count += 1
 
         # Capture current screen state
-        screenshot = get_screenshot(self.agent_config.device_id)
-        current_app = get_current_app(self.agent_config.device_id)
+        device_factory = get_device_factory()
+        screenshot = device_factory.get_screenshot(self.agent_config.device_id)
+        current_app = device_factory.get_current_app(self.agent_config.device_id)
 
         # Build messages
         if is_first:
diff --git a/phone_agent/config/apps_harmonyos.py b/phone_agent/config/apps_harmonyos.py
new file mode 100644
index 0000000..5ffb52c
--- /dev/null
+++ b/phone_agent/config/apps_harmonyos.py
@@ -0,0 +1,266 @@
+"""HarmonyOS application package name mappings.
+
+Maps user-friendly app names to HarmonyOS bundle names.
+These bundle names are used with the 'hdc shell aa start -b <bundle>' command.
+"""
+
+# Custom ability names for apps that don't use the default "EntryAbility"
+# Maps bundle_name -> ability_name
+# Generated by: python test/find_abilities.py
+APP_ABILITIES: dict[str, str] = {
+    # Third-party apps
+    "cn.wps.mobileoffice.hap": "DocumentAbility",
+    "com.ccb.mobilebank.hm": "CcbMainAbility",
+    "com.dewu.hos": "HomeAbility",
+    "com.larus.nova.hm": "MainAbility",
+    "com.luna.hm.music": "MainAbility",
+    "com.meitu.meitupic": "MainAbility",
+    "com.ss.hm.article.news": "MainAbility",
+    "com.ss.hm.ugc.aweme": "MainAbility",
+    "com.taobao.taobao4hmos": "Taobao_mainAbility",
+    "com.tencent.videohm": "AppAbility",
+    "com.ximalaya.ting.xmharmony": "MainBundleAbility",
+    "com.zhihu.hmos": "PhoneAbility",
+
+    # Huawei system apps
+    "com.huawei.hmos.browser": "MainAbility",
+    "com.huawei.hmos.calculator": "com.huawei.hmos.calculator.CalculatorAbility",
+    "com.huawei.hmos.calendar": "MainAbility",
+    "com.huawei.hmos.camera": "com.huawei.hmos.camera.MainAbility",
+    "com.huawei.hmos.clock": "com.huawei.hmos.clock.phone",
+    "com.huawei.hmos.clouddrive": "MainAbility",
+    "com.huawei.hmos.email": "ApplicationAbility",
+    "com.huawei.hmos.filemanager": "MainAbility",
+    "com.huawei.hmos.health": "Activity_card_entryAbility",
+    "com.huawei.hmos.notepad": "MainAbility",
+    "com.huawei.hmos.photos": "MainAbility",
+    "com.huawei.hmos.screenrecorder": "com.huawei.hmos.screenrecorder.ServiceExtAbility",
+    "com.huawei.hmos.screenshot": "com.huawei.hmos.screenshot.ServiceExtAbility",
+    "com.huawei.hmos.settings": "com.huawei.hmos.settings.MainAbility",
+    "com.huawei.hmos.soundrecorder": "MainAbility",
+    "com.huawei.hmos.vassistant": "AiCaptionServiceExtAbility",
+    "com.huawei.hmos.wallet": "MainAbility",
+
+    # Huawei services
+    "com.huawei.hmsapp.appgallery": "MainAbility",
+    "com.huawei.hmsapp.books": "MainAbility",
+    "com.huawei.hmsapp.himovie": "MainAbility",
+    "com.huawei.hmsapp.hisearch": "MainAbility",
+    "com.huawei.hmsapp.music": "MainAbility",
+    "com.huawei.hmsapp.thememanager": "MainAbility",
+    "com.huawei.hmsapp.totemweather": "com.huawei.hmsapp.totemweather.MainAbility",
+
+    # OHOS system apps
+    "com.ohos.callui": "com.ohos.callui.ServiceAbility",
+    "com.ohos.contacts": "com.ohos.contacts.MainAbility",
+    "com.ohos.mms": "com.ohos.mms.MainAbility",
+}
+
+APP_PACKAGES: dict[str, str] = {
+    # Social & Messaging
+    "微信": "com.tencent.wechat",
+    "QQ": "com.tencent.mqq",
+    "微博": "com.sina.weibo.stage",
+    # E-commerce
+    "淘宝": "com.taobao.taobao4hmos",
+    "京东": "com.jd.hm.mall",
+    "拼多多": "com.xunmeng.pinduoduo.hos",
+    "淘宝闪购": "com.taobao.taobao4hmos",
+    "京东秒送": "com.jd.hm.mall",
+    # Lifestyle & Social
+    "小红书": "com.xingin.xhs_hos",
+    "知乎": "com.zhihu.hmos",
+    # "豆瓣": "com.douban.frodo",  # 未在 hdc 列表中找到
+    # Maps & Navigation
+    "高德地图": "com.amap.hmapp",
+    "百度地图": "com.baidu.hmmap",
+    # Food & Services
+    "美团": "com.sankuai.hmeituan",
+    "美团外卖": "com.meituan.takeaway",
+    "大众点评": "com.sankuai.dianping",
+    # "肯德基": "com.yek.android.kfc.activitys",  # 未在 hdc 列表中找到
+    # Travel
+    # "携程": "ctrip.android.view",  # 未在 hdc 列表中找到
+    "铁路12306": "com.chinarailway.ticketingHM",
+    "12306": "com.chinarailway.ticketingHM",
+    # "去哪儿": "com.Qunar",  # 未在 hdc 列表中找到
+    # "去哪儿旅行": "com.Qunar",  # 未在 hdc 列表中找到
+    "滴滴出行": "com.sdu.didi.hmos.psnger",
+    # Video & Entertainment
+    "bilibili": "yylx.danmaku.bili",
+    "抖音": "com.ss.hm.ugc.aweme",
+    "快手": "com.kuaishou.hmapp",
+    "腾讯视频": "com.tencent.videohm",
+    "爱奇艺": "com.qiyi.video.hmy",
+    "芒果TV": "com.mgtv.phone",
+    # "优酷视频": "com.youku.phone",  # 未在 hdc 列表中找到
+    # "红果短剧": "com.phoenix.read",  # 未在 hdc 列表中找到
+    # Music & Audio
+    # "网易云音乐": "com.netease.cloudmusic",  # 未在 hdc 列表中找到
+    "QQ音乐": "com.tencent.hm.qqmusic",
+    "汽水音乐": "com.luna.hm.music",
+    "喜马拉雅": "com.ximalaya.ting.xmharmony",
+    # Reading
+    # "番茄小说": "com.dragon.read",  # 未在 hdc 列表中找到
+    # "番茄免费小说": "com.dragon.read",  # 未在 hdc 列表中找到
+    # "七猫免费小说": "com.kmxs.reader",  # 未在 hdc 列表中找到
+    # Productivity
+    "飞书": "com.ss.feishu",
+    # "QQ邮箱": "com.tencent.androidqqmail",  # 未在 hdc 列表中找到
+    # AI & Tools
+    "豆包": "com.larus.nova.hm",
+    # Health & Fitness
+    # "keep": "com.gotokeep.keep",  # 未在 hdc 列表中找到
+    # "美柚": "com.lingan.seeyou",  # 未在 hdc 列表中找到
+    # News & Information
+    # "腾讯新闻": "com.tencent.news",  # 未在 hdc 列表中找到
+    "今日头条": "com.ss.hm.article.news",
+    # Real Estate
+    # "贝壳找房": "com.lianjia.beike",  # 未在 hdc 列表中找到
+    # "安居客": "com.anjuke.android.app",  # 未在 hdc 列表中找到
+    # Finance
+    # "同花顺": "com.hexin.plat.android",  # 未在 hdc 列表中找到
+    # Games
+    # "星穹铁道": "com.miHoYo.hkrpg",  # 未在 hdc 列表中找到
+    # "崩坏：星穹铁道": "com.miHoYo.hkrpg",  # 未在 hdc 列表中找到
+    # "恋与深空": "com.papegames.lysk.cn",  # 未在 hdc 列表中找到
+    
+    # HarmonyOS 第三方应用
+    "百度": "com.baidu.baiduapp",
+    "阿里巴巴": "com.alibaba.wireless_hmos",
+    "WPS": "cn.wps.mobileoffice.hap",
+    "企业微信": "com.tencent.wework.hmos",
+    "同程": "com.tongcheng.hmos",
+    "同程旅行": "com.tongcheng.hmos",
+    "唯品会": "com.vip.hosapp",
+    "支付宝": "com.alipay.mobile.client",
+    "UC浏览器": "com.uc.mobile",
+    "闲鱼": "com.taobao.idlefish4ohos",
+    "转转": "com.zhuanzhuan.hmoszz",
+    "迅雷": "com.xunlei.thunder",
+    "搜狗输入法": "com.sogou.input",
+    "扫描全能王": "com.intsig.camscanner.hap",
+    "美图秀秀": "com.meitu.meitupic",
+    "58同城": "com.wuba.life",
+    "得物": "com.dewu.hos",
+    "海底捞": "com.haidilao.haros",
+    "中国移动": "com.droi.tong",
+    "中国联通": "com.sinovatech.unicom.ha",
+    "国家税务总局": "cn.gov.chinatax.gt4.hm",
+    "建设银行": "com.ccb.mobilebank.hm",
+    "快手极速版": "com.kuaishou.hmnebula",
+    
+    # HarmonyOS 系统应用 - 工具类
+    "浏览器": "com.huawei.hmos.browser",
+    "计算器": "com.huawei.hmos.calculator",
+    "日历": "com.huawei.hmos.calendar",
+    "相机": "com.huawei.hmos.camera",
+    "时钟": "com.huawei.hmos.clock",
+    "云盘": "com.huawei.hmos.clouddrive",
+    "云空间": "com.huawei.hmos.clouddrive",
+    "邮件": "com.huawei.hmos.email",
+    "文件管理器": "com.huawei.hmos.filemanager",
+    "文件": "com.huawei.hmos.files",
+    "查找设备": "com.huawei.hmos.finddevice",
+    "查找手机": "com.huawei.hmos.finddevice",
+    "录音机": "com.huawei.hmos.soundrecorder",
+    "录音": "com.huawei.hmos.soundrecorder",
+    "录屏": "com.huawei.hmos.screenrecorder",
+    "截屏": "com.huawei.hmos.screenshot",
+    "笔记": "com.huawei.hmos.notepad",
+    "备忘录": "com.huawei.hmos.notepad",
+    
+    # HarmonyOS 系统应用 - 媒体类
+    "相册": "com.huawei.hmos.photos",
+    "图库": "com.huawei.hmos.photos",
+    # "视频": "com.huawei.hmos.mediaplayer",  # 未在 hdc 列表中找到，但有 com.huawei.hmsapp.himovie
+    
+    # HarmonyOS 系统应用 - 通讯类
+    "联系人": "com.ohos.contacts",
+    "通讯录": "com.ohos.contacts",
+    "短信": "com.ohos.mms",
+    "信息": "com.ohos.mms",
+    "电话": "com.ohos.callui",
+    "拨号": "com.ohos.callui",
+    
+    # HarmonyOS 系统应用 - 设置类
+    "设置": "com.huawei.hmos.settings",
+    "系统设置": "com.huawei.hmos.settings",
+    "AndroidSystemSettings": "com.huawei.hmos.settings",
+    "Android System Settings": "com.huawei.hmos.settings",
+    "Android  System Settings": "com.huawei.hmos.settings",
+    "Android-System-Settings": "com.huawei.hmos.settings",
+    "Settings": "com.huawei.hmos.settings",
+    
+    # HarmonyOS 系统应用 - 生活服务
+    "健康": "com.huawei.hmos.health",
+    "运动健康": "com.huawei.hmos.health",
+    "地图": "com.huawei.hmos.maps.app",
+    "华为地图": "com.huawei.hmos.maps.app",
+    "钱包": "com.huawei.hmos.wallet",
+    "华为钱包": "com.huawei.hmos.wallet",
+    "智慧生活": "com.huawei.hmos.ailife",
+    "智能助手": "com.huawei.hmos.vassistant",
+    "小艺": "com.huawei.hmos.vassistant",
+    
+    # HarmonyOS 服务
+    "应用市场": "com.huawei.hmsapp.appgallery",
+    "华为应用市场": "com.huawei.hmsapp.appgallery",
+    "音乐": "com.huawei.hmsapp.music",
+    "华为音乐": "com.huawei.hmsapp.music",
+    "主题": "com.huawei.hmsapp.thememanager",
+    "主题管理": "com.huawei.hmsapp.thememanager",
+    "天气": "com.huawei.hmsapp.totemweather",
+    "华为天气": "com.huawei.hmsapp.totemweather",
+    "视频": "com.huawei.hmsapp.himovie",
+    "华为视频": "com.huawei.hmsapp.himovie",
+    "阅读": "com.huawei.hmsapp.books",
+    "华为阅读": "com.huawei.hmsapp.books",
+    "游戏中心": "com.huawei.hmsapp.gamecenter",
+    "华为游戏中心": "com.huawei.hmsapp.gamecenter",
+    "搜索": "com.huawei.hmsapp.hisearch",
+    "华为搜索": "com.huawei.hmsapp.hisearch",
+    "指南针": "com.huawei.hmsapp.compass",
+    "会员中心": "com.huawei.hmos.myhuawei",
+    "我的华为": "com.huawei.hmos.myhuawei",
+    "华为会员": "com.huawei.hmos.myhuawei",
+}
+
+
+def get_package_name(app_name: str) -> str | None:
+    """
+    Get the package name for an app.
+
+    Args:
+        app_name: The display name of the app.
+
+    Returns:
+        The HarmonyOS bundle name, or None if not found.
+    """
+    return APP_PACKAGES.get(app_name)
+
+
+def get_app_name(package_name: str) -> str | None:
+    """
+    Get the app name from a package name.
+
+    Args:
+        package_name: The HarmonyOS bundle name.
+
+    Returns:
+        The display name of the app, or None if not found.
+    """
+    for name, package in APP_PACKAGES.items():
+        if package == package_name:
+            return name
+    return None
+
+
+def list_supported_apps() -> list[str]:
+    """
+    Get a list of all supported app names.
+
+    Returns:
+        List of app names.
+    """
+    return list(APP_PACKAGES.keys())
diff --git a/phone_agent/device_factory.py b/phone_agent/device_factory.py
new file mode 100644
index 0000000..f7d3c46
--- /dev/null
+++ b/phone_agent/device_factory.py
@@ -0,0 +1,138 @@
+"""Device factory for selecting ADB or HDC based on device type."""
+
+from enum import Enum
+from typing import Any
+
+
+class DeviceType(Enum):
+    """Type of device connection tool."""
+
+    ADB = "adb"
+    HDC = "hdc"
+
+
+class DeviceFactory:
+    """
+    Factory class for getting device-specific implementations.
+
+    This allows the system to work with both Android (ADB) and HarmonyOS (HDC) devices.
+    """
+
+    def __init__(self, device_type: DeviceType = DeviceType.ADB):
+        """
+        Initialize the device factory.
+
+        Args:
+            device_type: The type of device to use (ADB or HDC).
+        """
+        self.device_type = device_type
+        self._module = None
+
+    @property
+    def module(self):
+        """Get the appropriate device module (adb or hdc)."""
+        if self._module is None:
+            if self.device_type == DeviceType.ADB:
+                from phone_agent import adb
+                self._module = adb
+            elif self.device_type == DeviceType.HDC:
+                from phone_agent import hdc
+                self._module = hdc
+            else:
+                raise ValueError(f"Unknown device type: {self.device_type}")
+        return self._module
+
+    def get_screenshot(self, device_id: str | None = None, timeout: int = 10):
+        """Get screenshot from device."""
+        return self.module.get_screenshot(device_id, timeout)
+
+    def get_current_app(self, device_id: str | None = None) -> str:
+        """Get current app name."""
+        return self.module.get_current_app(device_id)
+
+    def tap(self, x: int, y: int, device_id: str | None = None, delay: float | None = None):
+        """Tap at coordinates."""
+        return self.module.tap(x, y, device_id, delay)
+
+    def double_tap(self, x: int, y: int, device_id: str | None = None, delay: float | None = None):
+        """Double tap at coordinates."""
+        return self.module.double_tap(x, y, device_id, delay)
+
+    def long_press(self, x: int, y: int, duration_ms: int = 3000, device_id: str | None = None, delay: float | None = None):
+        """Long press at coordinates."""
+        return self.module.long_press(x, y, duration_ms, device_id, delay)
+
+    def swipe(self, start_x: int, start_y: int, end_x: int, end_y: int, duration_ms: int | None = None, device_id: str | None = None, delay: float | None = None):
+        """Swipe from start to end."""
+        return self.module.swipe(start_x, start_y, end_x, end_y, duration_ms, device_id, delay)
+
+    def back(self, device_id: str | None = None, delay: float | None = None):
+        """Press back button."""
+        return self.module.back(device_id, delay)
+
+    def home(self, device_id: str | None = None, delay: float | None = None):
+        """Press home button."""
+        return self.module.home(device_id, delay)
+
+    def launch_app(self, app_name: str, device_id: str | None = None, delay: float | None = None) -> bool:
+        """Launch an app."""
+        return self.module.launch_app(app_name, device_id, delay)
+
+    def type_text(self, text: str, device_id: str | None = None):
+        """Type text."""
+        return self.module.type_text(text, device_id)
+
+    def clear_text(self, device_id: str | None = None):
+        """Clear text."""
+        return self.module.clear_text(device_id)
+
+    def detect_and_set_adb_keyboard(self, device_id: str | None = None) -> str:
+        """Detect and set keyboard."""
+        return self.module.detect_and_set_adb_keyboard(device_id)
+
+    def restore_keyboard(self, ime: str, device_id: str | None = None):
+        """Restore keyboard."""
+        return self.module.restore_keyboard(ime, device_id)
+
+    def list_devices(self):
+        """List connected devices."""
+        return self.module.list_devices()
+
+    def get_connection_class(self):
+        """Get the connection class (ADBConnection or HDCConnection)."""
+        if self.device_type == DeviceType.ADB:
+            from phone_agent.adb import ADBConnection
+            return ADBConnection
+        elif self.device_type == DeviceType.HDC:
+            from phone_agent.hdc import HDCConnection
+            return HDCConnection
+        else:
+            raise ValueError(f"Unknown device type: {self.device_type}")
+
+
+# Global device factory instance
+_device_factory: DeviceFactory | None = None
+
+
+def set_device_type(device_type: DeviceType):
+    """
+    Set the global device type.
+
+    Args:
+        device_type: The device type to use (ADB or HDC).
+    """
+    global _device_factory
+    _device_factory = DeviceFactory(device_type)
+
+
+def get_device_factory() -> DeviceFactory:
+    """
+    Get the global device factory instance.
+
+    Returns:
+        The device factory instance.
+    """
+    global _device_factory
+    if _device_factory is None:
+        _device_factory = DeviceFactory(DeviceType.ADB)  # Default to ADB
+    return _device_factory
diff --git a/phone_agent/hdc/__init__.py b/phone_agent/hdc/__init__.py
new file mode 100644
index 0000000..9b06993
--- /dev/null
+++ b/phone_agent/hdc/__init__.py
@@ -0,0 +1,53 @@
+"""HDC utilities for HarmonyOS device interaction."""
+
+from phone_agent.hdc.connection import (
+    HDCConnection,
+    ConnectionType,
+    DeviceInfo,
+    list_devices,
+    quick_connect,
+    set_hdc_verbose,
+)
+from phone_agent.hdc.device import (
+    back,
+    double_tap,
+    get_current_app,
+    home,
+    launch_app,
+    long_press,
+    swipe,
+    tap,
+)
+from phone_agent.hdc.input import (
+    clear_text,
+    detect_and_set_adb_keyboard,
+    restore_keyboard,
+    type_text,
+)
+from phone_agent.hdc.screenshot import get_screenshot
+
+__all__ = [
+    # Screenshot
+    "get_screenshot",
+    # Input
+    "type_text",
+    "clear_text",
+    "detect_and_set_adb_keyboard",
+    "restore_keyboard",
+    # Device control
+    "get_current_app",
+    "tap",
+    "swipe",
+    "back",
+    "home",
+    "double_tap",
+    "long_press",
+    "launch_app",
+    # Connection management
+    "HDCConnection",
+    "DeviceInfo",
+    "ConnectionType",
+    "quick_connect",
+    "list_devices",
+    "set_hdc_verbose",
+]
diff --git a/phone_agent/hdc/connection.py b/phone_agent/hdc/connection.py
new file mode 100644
index 0000000..15809f8
--- /dev/null
+++ b/phone_agent/hdc/connection.py
@@ -0,0 +1,381 @@
+"""HDC connection management for HarmonyOS devices."""
+
+import os
+import subprocess
+import time
+from dataclasses import dataclass
+from enum import Enum
+from typing import Optional
+
+from phone_agent.config.timing import TIMING_CONFIG
+
+
+# Global flag to control HDC command output
+_HDC_VERBOSE = os.getenv("HDC_VERBOSE", "false").lower() in ("true", "1", "yes")
+
+
+def _run_hdc_command(cmd: list, **kwargs) -> subprocess.CompletedProcess:
+    """
+    Run HDC command with optional verbose output.
+
+    Args:
+        cmd: Command list to execute.
+        **kwargs: Additional arguments for subprocess.run.
+
+    Returns:
+        CompletedProcess result.
+    """
+    if _HDC_VERBOSE:
+        print(f"[HDC] Running command: {' '.join(cmd)}")
+
+    result = subprocess.run(cmd, **kwargs)
+
+    if _HDC_VERBOSE and result.returncode != 0:
+        print(f"[HDC] Command failed with return code {result.returncode}")
+        if hasattr(result, 'stderr') and result.stderr:
+            print(f"[HDC] Error: {result.stderr}")
+
+    return result
+
+
+def set_hdc_verbose(verbose: bool):
+    """Set HDC verbose mode globally."""
+    global _HDC_VERBOSE
+    _HDC_VERBOSE = verbose
+
+
+class ConnectionType(Enum):
+    """Type of HDC connection."""
+
+    USB = "usb"
+    WIFI = "wifi"
+    REMOTE = "remote"
+
+
+@dataclass
+class DeviceInfo:
+    """Information about a connected device."""
+
+    device_id: str
+    status: str
+    connection_type: ConnectionType
+    model: str | None = None
+    harmony_version: str | None = None
+
+
+class HDCConnection:
+    """
+    Manages HDC connections to HarmonyOS devices.
+
+    Supports USB, WiFi, and remote TCP/IP connections.
+
+    Example:
+        >>> conn = HDCConnection()
+        >>> # Connect to remote device
+        >>> conn.connect("192.168.1.100:5555")
+        >>> # List devices
+        >>> devices = conn.list_devices()
+        >>> # Disconnect
+        >>> conn.disconnect("192.168.1.100:5555")
+    """
+
+    def __init__(self, hdc_path: str = "hdc"):
+        """
+        Initialize HDC connection manager.
+
+        Args:
+            hdc_path: Path to HDC executable.
+        """
+        self.hdc_path = hdc_path
+
+    def connect(self, address: str, timeout: int = 10) -> tuple[bool, str]:
+        """
+        Connect to a remote device via TCP/IP.
+
+        Args:
+            address: Device address in format "host:port" (e.g., "192.168.1.100:5555").
+            timeout: Connection timeout in seconds.
+
+        Returns:
+            Tuple of (success, message).
+
+        Note:
+            The remote device must have TCP/IP debugging enabled.
+        """
+        # Validate address format
+        if ":" not in address:
+            address = f"{address}:5555"  # Default HDC port
+
+        try:
+            result = _run_hdc_command(
+                [self.hdc_path, "tconn", address],
+                capture_output=True,
+                text=True,
+                timeout=timeout,
+            )
+
+            output = result.stdout + result.stderr
+
+            if "Connect OK" in output or "connected" in output.lower():
+                return True, f"Connected to {address}"
+            elif "already connected" in output.lower():
+                return True, f"Already connected to {address}"
+            else:
+                return False, output.strip()
+
+        except subprocess.TimeoutExpired:
+            return False, f"Connection timeout after {timeout}s"
+        except Exception as e:
+            return False, f"Connection error: {e}"
+
+    def disconnect(self, address: str | None = None) -> tuple[bool, str]:
+        """
+        Disconnect from a remote device.
+
+        Args:
+            address: Device address to disconnect. If None, disconnects all.
+
+        Returns:
+            Tuple of (success, message).
+        """
+        try:
+            if address:
+                cmd = [self.hdc_path, "tdisconn", address]
+            else:
+                # HDC doesn't have a "disconnect all" command, so we need to list and disconnect each
+                devices = self.list_devices()
+                for device in devices:
+                    if ":" in device.device_id:  # Remote device
+                        _run_hdc_command(
+                            [self.hdc_path, "tdisconn", device.device_id],
+                            capture_output=True,
+                            text=True,
+                            timeout=5
+                        )
+                return True, "Disconnected all remote devices"
+
+            result = _run_hdc_command(cmd, capture_output=True, text=True, encoding="utf-8", timeout=5)
+
+            output = result.stdout + result.stderr
+            return True, output.strip() or "Disconnected"
+
+        except Exception as e:
+            return False, f"Disconnect error: {e}"
+
+    def list_devices(self) -> list[DeviceInfo]:
+        """
+        List all connected devices.
+
+        Returns:
+            List of DeviceInfo objects.
+        """
+        try:
+            result = _run_hdc_command(
+                [self.hdc_path, "list", "targets"],
+                capture_output=True,
+                text=True,
+                timeout=5,
+            )
+
+            devices = []
+            for line in result.stdout.strip().split("\n"):
+                if not line.strip():
+                    continue
+
+                # HDC output format: device_id (status)
+                # Example: "192.168.1.100:5555" or "FMR0223C13000649"
+                device_id = line.strip()
+
+                # Determine connection type
+                if ":" in device_id:
+                    conn_type = ConnectionType.REMOTE
+                else:
+                    conn_type = ConnectionType.USB
+
+                # HDC doesn't provide detailed status in list command
+                # We assume "Connected" status for devices that appear
+                devices.append(
+                    DeviceInfo(
+                        device_id=device_id,
+                        status="device",
+                        connection_type=conn_type,
+                        model=None,
+                    )
+                )
+
+            return devices
+
+        except Exception as e:
+            print(f"Error listing devices: {e}")
+            return []
+
+    def get_device_info(self, device_id: str | None = None) -> DeviceInfo | None:
+        """
+        Get detailed information about a device.
+
+        Args:
+            device_id: Device ID. If None, uses first available device.
+
+        Returns:
+            DeviceInfo or None if not found.
+        """
+        devices = self.list_devices()
+
+        if not devices:
+            return None
+
+        if device_id is None:
+            return devices[0]
+
+        for device in devices:
+            if device.device_id == device_id:
+                return device
+
+        return None
+
+    def is_connected(self, device_id: str | None = None) -> bool:
+        """
+        Check if a device is connected.
+
+        Args:
+            device_id: Device ID to check. If None, checks if any device is connected.
+
+        Returns:
+            True if connected, False otherwise.
+        """
+        devices = self.list_devices()
+
+        if not devices:
+            return False
+
+        if device_id is None:
+            return len(devices) > 0
+
+        return any(d.device_id == device_id for d in devices)
+
+    def enable_tcpip(
+        self, port: int = 5555, device_id: str | None = None
+    ) -> tuple[bool, str]:
+        """
+        Enable TCP/IP debugging on a USB-connected device.
+
+        This allows subsequent wireless connections to the device.
+
+        Args:
+            port: TCP port for HDC (default: 5555).
+            device_id: Device ID. If None, uses first available device.
+
+        Returns:
+            Tuple of (success, message).
+
+        Note:
+            The device must be connected via USB first.
+            After this, you can disconnect USB and connect via WiFi.
+        """
+        try:
+            cmd = [self.hdc_path]
+            if device_id:
+                cmd.extend(["-t", device_id])
+            cmd.extend(["tmode", "port", str(port)])
+
+            result = _run_hdc_command(cmd, capture_output=True, text=True, encoding="utf-8", timeout=10)
+
+            output = result.stdout + result.stderr
+
+            if result.returncode == 0 or "success" in output.lower():
+                time.sleep(TIMING_CONFIG.connection.adb_restart_delay)
+                return True, f"TCP/IP mode enabled on port {port}"
+            else:
+                return False, output.strip()
+
+        except Exception as e:
+            return False, f"Error enabling TCP/IP: {e}"
+
+    def get_device_ip(self, device_id: str | None = None) -> str | None:
+        """
+        Get the IP address of a connected device.
+
+        Args:
+            device_id: Device ID. If None, uses first available device.
+
+        Returns:
+            IP address string or None if not found.
+        """
+        try:
+            cmd = [self.hdc_path]
+            if device_id:
+                cmd.extend(["-t", device_id])
+            cmd.extend(["shell", "ifconfig"])
+
+            result = _run_hdc_command(cmd, capture_output=True, text=True, encoding="utf-8", timeout=5)
+
+            # Parse IP from ifconfig output
+            for line in result.stdout.split("\n"):
+                if "inet addr:" in line or "inet " in line:
+                    parts = line.strip().split()
+                    for i, part in enumerate(parts):
+                        if "addr:" in part:
+                            ip = part.split(":")[1]
+                            # Filter out localhost
+                            if not ip.startswith("127."):
+                                return ip
+                        elif part == "inet" and i + 1 < len(parts):
+                            ip = parts[i + 1].split("/")[0]
+                            if not ip.startswith("127."):
+                                return ip
+
+            return None
+
+        except Exception as e:
+            print(f"Error getting device IP: {e}")
+            return None
+
+    def restart_server(self) -> tuple[bool, str]:
+        """
+        Restart the HDC server.
+
+        Returns:
+            Tuple of (success, message).
+        """
+        try:
+            # Kill server
+            _run_hdc_command(
+                [self.hdc_path, "kill"], capture_output=True, timeout=5
+            )
+
+            time.sleep(TIMING_CONFIG.connection.server_restart_delay)
+
+            # Start server (HDC auto-starts when running commands)
+            _run_hdc_command(
+                [self.hdc_path, "start", "-r"], capture_output=True, timeout=5
+            )
+
+            return True, "HDC server restarted"
+
+        except Exception as e:
+            return False, f"Error restarting server: {e}"
+
+
+def quick_connect(address: str) -> tuple[bool, str]:
+    """
+    Quick helper to connect to a remote device.
+
+    Args:
+        address: Device address (e.g., "192.168.1.100" or "192.168.1.100:5555").
+
+    Returns:
+        Tuple of (success, message).
+    """
+    conn = HDCConnection()
+    return conn.connect(address)
+
+
+def list_devices() -> list[DeviceInfo]:
+    """
+    Quick helper to list connected devices.
+
+    Returns:
+        List of DeviceInfo objects.
+    """
+    conn = HDCConnection()
+    return conn.list_devices()
diff --git a/phone_agent/hdc/device.py b/phone_agent/hdc/device.py
new file mode 100644
index 0000000..63f23c3
--- /dev/null
+++ b/phone_agent/hdc/device.py
@@ -0,0 +1,272 @@
+"""Device control utilities for HarmonyOS automation."""
+
+import os
+import subprocess
+import time
+from typing import List, Optional, Tuple
+
+from phone_agent.config.apps_harmonyos import APP_ABILITIES, APP_PACKAGES
+from phone_agent.config.timing import TIMING_CONFIG
+from phone_agent.hdc.connection import _run_hdc_command
+
+
+def get_current_app(device_id: str | None = None) -> str:
+    """
+    Get the currently focused app name.
+
+    Args:
+        device_id: Optional HDC device ID for multi-device setups.
+
+    Returns:
+        The app name if recognized, otherwise "System Home".
+    """
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    result = _run_hdc_command(
+        hdc_prefix + ["shell", "hidumper", "-s", "WindowManagerService", "-a", "-a"],
+        capture_output=True,
+        text=True,
+        encoding="utf-8"
+    )
+    output = result.stdout
+    if not output:
+        raise ValueError("No output from hidumper")
+
+    # Parse window focus info
+    for line in output.split("\n"):
+        if "focused" in line.lower() or "current" in line.lower():
+            for app_name, package in APP_PACKAGES.items():
+                if package in line:
+                    return app_name
+
+    return "System Home"
+
+
+def tap(
+    x: int, y: int, device_id: str | None = None, delay: float | None = None
+) -> None:
+    """
+    Tap at the specified coordinates.
+
+    Args:
+        x: X coordinate.
+        y: Y coordinate.
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after tap. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_tap_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # HarmonyOS uses uitest uiInput click
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "click", str(x), str(y)],
+        capture_output=True
+    )
+    time.sleep(delay)
+
+
+def double_tap(
+    x: int, y: int, device_id: str | None = None, delay: float | None = None
+) -> None:
+    """
+    Double tap at the specified coordinates.
+
+    Args:
+        x: X coordinate.
+        y: Y coordinate.
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after double tap. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_double_tap_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # HarmonyOS uses uitest uiInput doubleClick
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "doubleClick", str(x), str(y)],
+        capture_output=True
+    )
+    time.sleep(delay)
+
+
+def long_press(
+    x: int,
+    y: int,
+    duration_ms: int = 3000,
+    device_id: str | None = None,
+    delay: float | None = None,
+) -> None:
+    """
+    Long press at the specified coordinates.
+
+    Args:
+        x: X coordinate.
+        y: Y coordinate.
+        duration_ms: Duration of press in milliseconds (note: HarmonyOS longClick may not support duration).
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after long press. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_long_press_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # HarmonyOS uses uitest uiInput longClick
+    # Note: longClick may have a fixed duration, duration_ms parameter might not be supported
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "longClick", str(x), str(y)],
+        capture_output=True,
+    )
+    time.sleep(delay)
+
+
+def swipe(
+    start_x: int,
+    start_y: int,
+    end_x: int,
+    end_y: int,
+    duration_ms: int | None = None,
+    device_id: str | None = None,
+    delay: float | None = None,
+) -> None:
+    """
+    Swipe from start to end coordinates.
+
+    Args:
+        start_x: Starting X coordinate.
+        start_y: Starting Y coordinate.
+        end_x: Ending X coordinate.
+        end_y: Ending Y coordinate.
+        duration_ms: Duration of swipe in milliseconds (auto-calculated if None).
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after swipe. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_swipe_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    if duration_ms is None:
+        # Calculate duration based on distance
+        dist_sq = (start_x - end_x) ** 2 + (start_y - end_y) ** 2
+        duration_ms = int(dist_sq / 1000)
+        duration_ms = max(500, min(duration_ms, 1000))  # Clamp between 500-1000ms
+
+    # HarmonyOS uses uitest uiInput swipe
+    # Format: swipe startX startY endX endY duration
+    _run_hdc_command(
+        hdc_prefix
+        + [
+            "shell",
+            "uitest",
+            "uiInput",
+            "swipe",
+            str(start_x),
+            str(start_y),
+            str(end_x),
+            str(end_y),
+            str(duration_ms),
+        ],
+        capture_output=True,
+    )
+    time.sleep(delay)
+
+
+def back(device_id: str | None = None, delay: float | None = None) -> None:
+    """
+    Press the back button.
+
+    Args:
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after pressing back. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_back_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # HarmonyOS uses uitest uiInput keyEvent Back
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "Back"],
+        capture_output=True
+    )
+    time.sleep(delay)
+
+
+def home(device_id: str | None = None, delay: float | None = None) -> None:
+    """
+    Press the home button.
+
+    Args:
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after pressing home. If None, uses configured default.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_home_delay
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # HarmonyOS uses uitest uiInput keyEvent Home
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "Home"],
+        capture_output=True
+    )
+    time.sleep(delay)
+
+
+def launch_app(
+    app_name: str, device_id: str | None = None, delay: float | None = None
+) -> bool:
+    """
+    Launch an app by name.
+
+    Args:
+        app_name: The app name (must be in APP_PACKAGES).
+        device_id: Optional HDC device ID.
+        delay: Delay in seconds after launching. If None, uses configured default.
+
+    Returns:
+        True if app was launched, False if app not found.
+    """
+    if delay is None:
+        delay = TIMING_CONFIG.device.default_launch_delay
+
+    if app_name not in APP_PACKAGES:
+        print(f"[HDC] App '{app_name}' not found in HarmonyOS app list")
+        print(f"[HDC] Available apps: {', '.join(sorted(APP_PACKAGES.keys())[:10])}...")
+        return False
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+    bundle = APP_PACKAGES[app_name]
+
+    # Get the ability name for this bundle
+    # Default to "EntryAbility" if not specified in APP_ABILITIES
+    ability = APP_ABILITIES.get(bundle, "EntryAbility")
+
+    # HarmonyOS uses 'aa start' command to launch apps
+    # Format: aa start -b {bundle} -a {ability}
+    _run_hdc_command(
+        hdc_prefix
+        + [
+            "shell",
+            "aa",
+            "start",
+            "-b",
+            bundle,
+            "-a",
+            ability,
+        ],
+        capture_output=True,
+    )
+    time.sleep(delay)
+    return True
+
+
+def _get_hdc_prefix(device_id: str | None) -> list:
+    """Get HDC command prefix with optional device specifier."""
+    if device_id:
+        return ["hdc", "-t", device_id]
+    return ["hdc"]
diff --git a/phone_agent/hdc/input.py b/phone_agent/hdc/input.py
new file mode 100644
index 0000000..920cf7d
--- /dev/null
+++ b/phone_agent/hdc/input.py
@@ -0,0 +1,149 @@
+"""Input utilities for HarmonyOS device text input."""
+
+import base64
+import subprocess
+from typing import Optional
+
+from phone_agent.hdc.connection import _run_hdc_command
+
+
+def type_text(text: str, device_id: str | None = None) -> None:
+    """
+    Type text into the currently focused input field.
+
+    Args:
+        text: The text to type. Supports multi-line text with newline characters.
+        device_id: Optional HDC device ID for multi-device setups.
+
+    Note:
+        HarmonyOS uses: hdc shell uitest uiInput text "文本内容"
+        This command works without coordinates when input field is focused.
+        For multi-line text, the function splits by newlines and sends ENTER keyEvents.
+        ENTER key code in HarmonyOS: 2054
+        Recommendation: Click on the input field first to focus it, then use this function.
+    """
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # Handle multi-line text by splitting on newlines
+    if '\n' in text:
+        lines = text.split('\n')
+        for i, line in enumerate(lines):
+            if line:  # Only process non-empty lines
+                # Escape special characters for shell
+                escaped_line = line.replace('"', '\\"').replace("$", "\\$")
+
+                _run_hdc_command(
+                    hdc_prefix + ["shell", "uitest", "uiInput", "text", escaped_line],
+                    capture_output=True,
+                    text=True,
+                )
+
+            # Send ENTER key event after each line except the last one
+            if i < len(lines) - 1:
+                try:
+                    _run_hdc_command(
+                        hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "2054"],
+                        capture_output=True,
+                        text=True,
+                    )
+                except Exception as e:
+                    print(f"[HDC] ENTER keyEvent failed: {e}")
+    else:
+        # Single line text - original logic
+        # Escape special characters for shell (keep quotes for proper text handling)
+        # The text will be wrapped in quotes in the command
+        escaped_text = text.replace('"', '\\"').replace("$", "\\$")
+
+        # HarmonyOS uitest uiInput text command
+        # Format: hdc shell uitest uiInput text "文本内容"
+        _run_hdc_command(
+            hdc_prefix + ["shell", "uitest", "uiInput", "text", escaped_text],
+            capture_output=True,
+            text=True,
+        )
+
+
+def clear_text(device_id: str | None = None) -> None:
+    """
+    Clear text in the currently focused input field.
+
+    Args:
+        device_id: Optional HDC device ID for multi-device setups.
+
+    Note:
+        This method uses repeated delete key events to clear text.
+        For HarmonyOS, you might also use select all + delete for better efficiency.
+    """
+    hdc_prefix = _get_hdc_prefix(device_id)
+    # Ctrl+A to select all (key code 2072 for Ctrl, 2017 for A)
+    # Then delete
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "2072", "2017"],
+        capture_output=True,
+        text=True,
+    )
+    _run_hdc_command(
+        hdc_prefix + ["shell", "uitest", "uiInput", "keyEvent", "2055"],  # Delete key
+        capture_output=True,
+        text=True,
+    )
+
+
+def detect_and_set_adb_keyboard(device_id: str | None = None) -> str:
+    """
+    Detect current keyboard and switch to ADB Keyboard if available.
+
+    Args:
+        device_id: Optional HDC device ID for multi-device setups.
+
+    Returns:
+        The original keyboard IME identifier for later restoration.
+
+    Note:
+        This is a placeholder. HarmonyOS may not support ADB Keyboard.
+        If there's a similar tool for HarmonyOS, integrate it here.
+    """
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    # Get current IME (if HarmonyOS supports this)
+    try:
+        result = _run_hdc_command(
+            hdc_prefix + ["shell", "settings", "get", "secure", "default_input_method"],
+            capture_output=True,
+            text=True,
+        )
+        current_ime = (result.stdout + result.stderr).strip()
+
+        # If ADB Keyboard equivalent exists for HarmonyOS, switch to it
+        # For now, we'll just return the current IME
+        return current_ime
+    except Exception:
+        return ""
+
+
+def restore_keyboard(ime: str, device_id: str | None = None) -> None:
+    """
+    Restore the original keyboard IME.
+
+    Args:
+        ime: The IME identifier to restore.
+        device_id: Optional HDC device ID for multi-device setups.
+    """
+    if not ime:
+        return
+
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    try:
+        _run_hdc_command(
+            hdc_prefix + ["shell", "ime", "set", ime], capture_output=True, text=True
+        )
+    except Exception:
+        pass
+
+
+def _get_hdc_prefix(device_id: str | None) -> list:
+    """Get HDC command prefix with optional device specifier."""
+    if device_id:
+        return ["hdc", "-t", device_id]
+    return ["hdc"]
diff --git a/phone_agent/hdc/screenshot.py b/phone_agent/hdc/screenshot.py
new file mode 100644
index 0000000..332d198
--- /dev/null
+++ b/phone_agent/hdc/screenshot.py
@@ -0,0 +1,125 @@
+"""Screenshot utilities for capturing HarmonyOS device screen."""
+
+import base64
+import os
+import subprocess
+import tempfile
+import uuid
+from dataclasses import dataclass
+from io import BytesIO
+from typing import Tuple
+
+from PIL import Image
+from phone_agent.hdc.connection import _run_hdc_command
+
+
+@dataclass
+class Screenshot:
+    """Represents a captured screenshot."""
+
+    base64_data: str
+    width: int
+    height: int
+    is_sensitive: bool = False
+
+
+def get_screenshot(device_id: str | None = None, timeout: int = 10) -> Screenshot:
+    """
+    Capture a screenshot from the connected HarmonyOS device.
+
+    Args:
+        device_id: Optional HDC device ID for multi-device setups.
+        timeout: Timeout in seconds for screenshot operations.
+
+    Returns:
+        Screenshot object containing base64 data and dimensions.
+
+    Note:
+        If the screenshot fails (e.g., on sensitive screens like payment pages),
+        a black fallback image is returned with is_sensitive=True.
+    """
+    temp_path = os.path.join(tempfile.gettempdir(), f"screenshot_{uuid.uuid4()}.png")
+    hdc_prefix = _get_hdc_prefix(device_id)
+
+    try:
+        # Execute screenshot command
+        # HarmonyOS HDC only supports JPEG format
+        remote_path = "/data/local/tmp/tmp_screenshot.jpeg"
+
+        # Try method 1: hdc shell screenshot (newer HarmonyOS versions)
+        result = _run_hdc_command(
+            hdc_prefix + ["shell", "screenshot", remote_path],
+            capture_output=True,
+            text=True,
+            timeout=timeout,
+        )
+
+        # Check for screenshot failure (sensitive screen)
+        output = result.stdout + result.stderr
+        if "fail" in output.lower() or "error" in output.lower() or "not found" in output.lower():
+            # Try method 2: snapshot_display (older versions or different devices)
+            result = _run_hdc_command(
+                hdc_prefix + ["shell", "snapshot_display", "-f", remote_path],
+                capture_output=True,
+                text=True,
+                timeout=timeout,
+            )
+            output = result.stdout + result.stderr
+            if "fail" in output.lower() or "error" in output.lower():
+                return _create_fallback_screenshot(is_sensitive=True)
+
+        # Pull screenshot to local temp path
+        # Note: remote file is JPEG, but PIL can open it regardless of local extension
+        _run_hdc_command(
+            hdc_prefix + ["file", "recv", remote_path, temp_path],
+            capture_output=True,
+            text=True,
+            timeout=5,
+        )
+
+        if not os.path.exists(temp_path):
+            return _create_fallback_screenshot(is_sensitive=False)
+
+        # Read JPEG image and convert to PNG for model inference
+        # PIL automatically detects the image format from file content
+        img = Image.open(temp_path)
+        width, height = img.size
+
+        buffered = BytesIO()
+        img.save(buffered, format="PNG")
+        base64_data = base64.b64encode(buffered.getvalue()).decode("utf-8")
+
+        # Cleanup
+        os.remove(temp_path)
+
+        return Screenshot(
+            base64_data=base64_data, width=width, height=height, is_sensitive=False
+        )
+
+    except Exception as e:
+        print(f"Screenshot error: {e}")
+        return _create_fallback_screenshot(is_sensitive=False)
+
+
+def _get_hdc_prefix(device_id: str | None) -> list:
+    """Get HDC command prefix with optional device specifier."""
+    if device_id:
+        return ["hdc", "-t", device_id]
+    return ["hdc"]
+
+
+def _create_fallback_screenshot(is_sensitive: bool) -> Screenshot:
+    """Create a black fallback image when screenshot fails."""
+    default_width, default_height = 1080, 2400
+
+    black_img = Image.new("RGB", (default_width, default_height), color="black")
+    buffered = BytesIO()
+    black_img.save(buffered, format="PNG")
+    base64_data = base64.b64encode(buffered.getvalue()).decode("utf-8")
+
+    return Screenshot(
+        base64_data=base64_data,
+        width=default_width,
+        height=default_height,
+        is_sensitive=is_sensitive,
+    )