diff --git a/padsleep.py b/padsleep.py
index f06a0af..005fb3f 100644
--- a/padsleep.py
+++ b/padsleep.py
@@ -274,6 +274,7 @@ class AdbManager:
         self._screen_on_since: float | None = None
         self._last_known_screen_on = False
         self._last_adb_check = 0  # 限频用
+        self._prev_ready = False  # 前次 ADB 就绪状态，用于检测变化
         self._current_serial: str | None = None  # 自动检测到的设备串号
         self._wireless_addr: str = ""  # 当前无线连接地址 (IP:PORT)
         self._wireless_retries: int = 0  # 无线重连尝试次数
@@ -331,11 +332,15 @@ class AdbManager:
                 self._wireless_addr = addr
                 self._wireless_retries = 0
                 log.info("无线 ADB 已连接: %s", addr)
+                if self._audit:
+                    self._audit.log("无线连接", f"已连接: {addr}")
                 return True, result
             return False, result
         except Exception as e:
             self._last_error = str(e)
             log.error("无线连接失败: %s", e)
+            if self._audit:
+                self._audit.log("无线连接失败", f"{addr}: {e}")
             return False, str(e)
 
     def disconnect_wireless(self, addr: str = "") -> bool:
@@ -347,6 +352,8 @@ class AdbManager:
             client = self._ensure_client()
             client.disconnect(target)
             log.info("无线 ADB 已断开: %s", target)
+            if self._audit:
+                self._audit.log("无线断开", f"已断开: {target}")
             if target == self._wireless_addr:
                 self._wireless_addr = ""
             return True
@@ -463,6 +470,9 @@ class AdbManager:
                         d.getprop("ro.build.version.sdk")
                         self._device = d
                         self._current_serial = d.serial
+                        if not self._prev_ready and self._audit:
+                            self._audit.log("ADB 设备已连接", f"串号: {d.serial}, 类型: USB")
+                        self._prev_ready = True
                         self._ready = True
                         self._last_error = ""
                         return True
@@ -477,6 +487,9 @@ class AdbManager:
                     if d.serial == wireless_addr:
                         d.getprop("ro.build.version.sdk")
                         self._device = d
+                        if not self._prev_ready and self._audit:
+                            self._audit.log("ADB 设备已连接", f"串号: {d.serial}, 类型: 无线")
+                        self._prev_ready = True
                         self._ready = True
                         self._last_error = ""
                         self._wireless_addr = wireless_addr
@@ -484,6 +497,9 @@ class AdbManager:
 
                 # 不在列表中，尝试连接
                 if self.ensure_wireless_connection():
+                    if not self._prev_ready and self._audit:
+                        self._audit.log("ADB 设备已连接", f"串号: {wireless_addr}, 类型: 无线")
+                    self._prev_ready = True
                     return True
 
             if not devices and not wireless_host:
@@ -495,6 +511,11 @@ class AdbManager:
         except Exception as e:
             self._last_error = str(e)
 
+        # 如果之前是就绪状态但检测失败 → 设备断开
+        if self._prev_ready and self._audit:
+            last_serial = self._current_serial or (self._device.serial if self._device else "未知")
+            self._audit.log("ADB 设备已断开", f"上次串号: {last_serial}, 原因: {self._last_error}")
+        self._prev_ready = False
         self._ready = False
         self._device = None
         return False