diff --git a/CMakeLists.txt b/CMakeLists.txt
index 421de28..63f7814 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,6 +130,7 @@ set(SOURCES
     src/customwidget.cpp
     src/screenlockdetector.cpp
     src/screenlockdetector_base.cpp
+    src/powermonitor.cpp
 )
 
 set(HEADERS
@@ -138,6 +139,7 @@ set(HEADERS
     src/customwidget.h
     src/screenlockdetector.h
     src/screenlockdetector_base.h
+    src/powermonitor.h
 )
 
 # Add Vulkan widget if Vulkan is available
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 26cc1e6..56702dd 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -31,6 +31,9 @@ MainWindow::MainWindow(QWidget *parent)
     // 初始化锁屏检测器
     m_lockDetector = new ScreenLockDetector(this);
 
+    // 初始化电源监视器
+    m_powerMonitor = new PowerMonitor(this);
+
     // 初始化UI
     setupUI();
 
@@ -163,6 +166,12 @@ void MainWindow::setupConnections()
     connect(m_lockDetector, &ScreenLockDetector::lockStateChanged,
             this, &MainWindow::onLockStateChanged);
 
+    // 连接PowerMonitor信号
+    connect(m_powerMonitor, &PowerMonitor::aboutToSleep,
+            this, &MainWindow::onScreenLocked);
+    connect(m_powerMonitor, &PowerMonitor::aboutToWakeUp,
+            this, &MainWindow::onScreenUnlocked);
+
     // 连接按钮信号
     connect(m_enableRenderBtn, &QPushButton::clicked,
             this, &MainWindow::onEnableRenderingClicked);
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 3170e51..0a1ea1a 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -9,11 +9,12 @@
 #include <QGroupBox>
 #include <QTimer>
 #include "screenlockdetector.h"
+#include "powermonitor.h"
 #include "renderwidgetbase.h"
 
 /**
  * @brief 主窗口类
- * 
+ *
  * 整合锁屏检测器和渲染组件，提供用户界面
  * 使用统一的RenderWidgetBase基类指针，根据编译选项选择Vulkan或QPainter实现
  */
@@ -81,18 +82,19 @@ private:
 private:
     // 核心组件
     ScreenLockDetector *m_lockDetector;
+    PowerMonitor *m_powerMonitor;
     RenderWidgetBase *m_renderWidget;  // 统一的渲染组件指针
-    
+
     // UI组件
     QWidget *m_centralWidget;
     QVBoxLayout *m_mainLayout;
-    
+
     // 控制面板
     QGroupBox *m_controlGroup;
     QPushButton *m_enableRenderBtn;
     QPushButton *m_disableRenderBtn;
     QPushButton *m_resetFrameBtn;
-    
+
     // 状态显示
     QGroupBox *m_statusGroup;
     QLabel *m_rendererTypeLabel;
@@ -101,9 +103,9 @@ private:
     QLabel *m_frameCountLabel;
     QLabel *m_detectorStatusLabel;
     QLabel *m_initStatusLabel;
-    
+
     // 更新定时器
     QTimer *m_updateTimer;
 };
 
-#endif // MAINWINDOW_H
\ No newline at end of file
+#endif // MAINWINDOW_H
diff --git a/src/powermonitor.cpp b/src/powermonitor.cpp
new file mode 100644
index 0000000..20c6faf
--- /dev/null
+++ b/src/powermonitor.cpp
@@ -0,0 +1,48 @@
+#include "powermonitor.h"
+
+void PowerMonitor::initLogin1Dbus() {
+    // 连接 org.freedesktop.login1 服务（系统总线）
+    m_login1Interface = new QDBusInterface(
+        "org.freedesktop.login1",    // DBus 服务名
+        "/org/freedesktop/login1",   // 对象路径
+        "org.freedesktop.login1.Manager",  // 接口名
+        QDBusConnection::systemBus(),  // 系统总线（关键！不是会话总线）
+        this
+    );
+
+    // 检查接口是否有效
+    if (m_login1Interface->isValid()) {
+        // 监听 PrepareForSleep 信号（签名：b = bool）
+        bool connectOk = QDBusConnection::systemBus().connect(
+            "org.freedesktop.login1",    // 服务名
+            "/org/freedesktop/login1",   // 对象路径
+            "org.freedesktop.login1.Manager",  // 接口名
+            "PrepareForSleep",           // 信号名
+            this,
+            SLOT(onPrepareForSleep(bool))  // 接收信号的槽函数
+        );
+
+        if (connectOk) {
+            qDebug() << "✅ 成功连接 login1 电源管理接口";
+        } else {
+            qDebug() << "❌ 连接 login1 信号失败：" << QDBusConnection::systemBus().lastError().message();
+        }
+    } else {
+        qDebug() << "❌ 无法创建 login1 接口：" << m_login1Interface->lastError().message();
+        // 可选：fallback 到 GNOME 专用会话管理接口（见下文）
+        // initGnomeSessionManager();
+    }
+}
+
+// 槽函数：处理睡眠/唤醒事件
+void PowerMonitor::onPrepareForSleep(bool enteringSleep) {
+    if (enteringSleep) {
+        // 系统即将进入 休眠/待机 状态
+        qDebug() << "\n📥 系统即将进入睡眠（休眠/待机）";
+        emit aboutToSleep();
+    } else {
+        // 系统从睡眠中唤醒
+        qDebug() << "📤 系统已从睡眠中唤醒";
+        emit aboutToWakeUp();
+    }
+}
diff --git a/src/powermonitor.h b/src/powermonitor.h
new file mode 100644
index 0000000..8770a62
--- /dev/null
+++ b/src/powermonitor.h
@@ -0,0 +1,39 @@
+#pragma once
+#include <QObject>
+#include <QDBusInterface>
+#include <QDBusConnection>
+#include <QDebug>
+
+class PowerMonitor : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit PowerMonitor(QObject *parent = nullptr) : QObject(parent) { initLogin1Dbus(); }
+
+signals:
+    /*
+     * @brief 发送即将唤醒的信号
+     */
+    void aboutToWakeUp();
+
+    /*
+     * @brief 发送即将进入睡眠的信号
+     */
+    void aboutToSleep();
+
+private slots:
+    /*
+     * @brief 处理睡眠/唤醒信号的槽函数
+     * @param enteringSleep 是否进入睡眠状态
+     */
+    void onPrepareForSleep(bool enteringSleep);
+
+private:
+    /*
+     * @brief 初始化Login1 DBus接口
+     */
+    void initLogin1Dbus();
+
+    QDBusInterface *m_login1Interface = nullptr;
+};