diff --git a/main/manager-api/src/main/java/xiaozhi/modules/device/dao/DeviceDao.java b/main/manager-api/src/main/java/xiaozhi/modules/device/dao/DeviceDao.java
index 5ede3d6e..abff8ab3 100644
--- a/main/manager-api/src/main/java/xiaozhi/modules/device/dao/DeviceDao.java
+++ b/main/manager-api/src/main/java/xiaozhi/modules/device/dao/DeviceDao.java
@@ -6,6 +6,16 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 
 import xiaozhi.modules.device.entity.DeviceEntity;
 
+import java.util.Date;
+import java.util.List;
+
 @Mapper
 public interface DeviceDao extends BaseMapper<DeviceEntity> {
+    /**
+     * 获取此智能体全部设备的最后连接时间
+     * @param agentId 智能体id
+     * @return
+     */
+    List<Date> getAllLastConnectedAtByAgentId(String agentId);
+
 }
\ No newline at end of file
diff --git a/main/manager-api/src/main/resources/mapper/device/DeviceDao.xml b/main/manager-api/src/main/resources/mapper/device/DeviceDao.xml
new file mode 100644
index 00000000..09f16760
--- /dev/null
+++ b/main/manager-api/src/main/resources/mapper/device/DeviceDao.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="xiaozhi.modules.device.dao.DeviceDao">
+    <!-- 获取此智能体全部设备的最后连接时间 -->
+    <select id="getAllLastConnectedAtByAgentId" resultType="java.util.Date">
+        SELECT last_connected_at FROM ai_device WHERE agent_id = #{agentId}
+    </select>
+</mapper> 
\ No newline at end of file