diff --git a/include/LedMqttSubscriber.h b/include/LedMqttSubscriber.h
index ef85fa4..a826456 100644
--- a/include/LedMqttSubscriber.h
+++ b/include/LedMqttSubscriber.h
@@ -7,7 +7,10 @@ class MqttClient
 {
 public:
     MqttClient(const std::string &configPath);
-    bool start();
+    ~MqttClient();
+
+    bool start();      // 连接并订阅
+    void disconnect(); // 断开连接
 
 private:
     std::string broker;
diff --git a/src/LedMqttSubscriber.cpp b/src/LedMqttSubscriber.cpp
index 1262d35..30bca30 100644
--- a/src/LedMqttSubscriber.cpp
+++ b/src/LedMqttSubscriber.cpp
@@ -49,6 +49,11 @@ MqttClient::MqttClient(const std::string &configPath)
     }
 }
 
+MqttClient::~MqttClient()
+{
+    delete client;
+}
+
 bool MqttClient::start()
 {
     try
@@ -65,6 +70,19 @@ bool MqttClient::start()
     }
 }
 
+void MqttClient::disconnect()
+{
+    try
+    {
+        std::cout << "断开 MQTT 连接..." << std::endl;
+        client->disconnect()->wait();
+    }
+    catch (const mqtt::exception &e)
+    {
+        std::cerr << "MQTT 断开失败: " << e.what() << std::endl;
+    }
+}
+
 void MqttClient::Callback::message_arrived(mqtt::const_message_ptr msg)
 {
     std::cout << "接收到消息: " << msg->to_string() << std::endl;
diff --git a/src/main.cpp b/src/main.cpp
index f552185..2b70e37 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -88,16 +88,21 @@ int main()
     std::cout << "串口号: " << port << "\n波特率: " << baudrate << std::endl;
 
     // ===== MQTT 测试连接 =====
-    MqttClient mqtt("config.toml"); // 构造时自动读取配置并初始化
-    if (mqtt.connect())
+    MqttClient mqtt("config.toml");
+    if (mqtt.start())
     {
-        std::cout << "MQTT 连接成功" << std::endl;
-        std::this_thread::sleep_for(std::chrono::seconds(2));
+        std::cout << "MQTT 启动成功，等待消息..." << std::endl;
+        std::this_thread::sleep_for(std::chrono::seconds(5));
         mqtt.disconnect();
     }
     else
     {
-        std::cerr << "MQTT 连接失败" << std::endl;
+        std::cerr << "MQTT 启动失败" << std::endl;
+    }
+
+    while (1)
+    {
+        /* code */
     }
 
     SerialPort serial;