diff --git a/include/record_manager.hpp b/include/record_manager.hpp
index f630a33..9b93f82 100644
--- a/include/record_manager.hpp
+++ b/include/record_manager.hpp
@@ -42,6 +42,7 @@ class RecordManager
 
     static int64_t toMsTimestamp(const std::string& s);
     static std::string toReadable(int64_t ms);
+    static std::string loc_to_stream(int loc);
 
    private:
     // === SRS 配置相关 ===
diff --git a/src/mqtt_client_wrapper.cpp b/src/mqtt_client_wrapper.cpp
index dcbc935..88a7e83 100644
--- a/src/mqtt_client_wrapper.cpp
+++ b/src/mqtt_client_wrapper.cpp
@@ -110,7 +110,69 @@ static void handle_video_down_request(const nlohmann::json& req)
     mqtt_client->publish(g_app_config.mqtt.topics.video_down, resp.dump(-1), 1);
 }
 
-static void handle_record_query_request(const nlohmann::json& req) {}
+static void handle_record_query_request(const nlohmann::json& req)
+{
+    // 1. 解析字段
+    if (!req.contains("data") || !req["data"].is_object())
+    {
+        LOG_WARN("[record_query] missing data");
+        return;
+    }
+
+    const auto& d = req["data"];
+    int loc = d.value("loc", -1);
+    int64_t start = d.value("startTime", -1LL);
+    int64_t end = d.value("endTime", -1LL);
+
+    if (loc < 0 || start <= 0 || end <= 0)
+    {
+        LOG_WARN("[record_query] invalid parameters");
+        return;
+    }
+
+    LOG_INFO("[record_query] loc=" + std::to_string(loc) + " start=" + std::to_string(start) +
+             " end=" + std::to_string(end));
+
+    // 2. 计算 stream 名
+    //    loc → stream，比如：
+    //    0 → "AHD1_main"
+    std::string stream = RTMPManager::loc_to_stream(loc);
+    if (stream.empty())
+    {
+        LOG_WARN("[record_query] invalid loc: " + std::to_string(loc));
+        return;
+    }
+
+    // 3. 向 RecordManager 查询录像段
+    auto segs = g_record_manager->querySegments(stream, start, end);
+
+    LOG_INFO("[record_query] Found segments=" + std::to_string(segs.size()));
+
+    // 4. 构造响应 JSON
+    nlohmann::json resp;
+    resp["type"] = "response";
+    resp["seqNo"] = req.value("seqNo", "0");
+
+    nlohmann::json data;
+    data["loc"] = loc;
+    data["segments"] = nlohmann::json::array();
+
+    int idx = 1;
+    for (const auto& seg : segs)
+    {
+        nlohmann::json s;
+        s["index"] = idx++;
+        s["segmentId"] = seg.segment_id;
+        s["startTime"] = seg.start_ms;
+        s["endTime"] = seg.end_ms;
+        data["segments"].push_back(s);
+    }
+
+    resp["data"] = data;
+
+    // 5. 发送 MQTT
+    mqtt_client->publish(g_app_config.mqtt.topics.record_query, resp.dump(-1), 1);
+}
 
 static void handle_record_play_request(const nlohmann::json& req) {}
 
diff --git a/src/record_manager.cpp b/src/record_manager.cpp
index 015e3a6..ae3155a 100644
--- a/src/record_manager.cpp
+++ b/src/record_manager.cpp
@@ -329,3 +329,11 @@ std::string RecordManager::toReadable(int64_t ms)
     strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm);
     return buf;
 }
+
+std::string RecordManager::loc_to_stream(int loc)
+{
+    // loc 必须 0~7
+    if (loc < 0 || loc > 7) return "";
+
+    return "AHD" + std::to_string(loc + 1) + "_main";
+}