diff --git a/src/communication/mqtt_report/CMakeLists.txt b/src/communication/mqtt_report/CMakeLists.txt
index a5c4f50..5f242cd 100644
--- a/src/communication/mqtt_report/CMakeLists.txt
+++ b/src/communication/mqtt_report/CMakeLists.txt
@@ -31,10 +31,12 @@ include_directories(include ${catkin_INCLUDE_DIRS})
 
 add_executable(
   mqtt_report_node
-  src/mqtt_report_node.cpp
+  src/node/mqtt_vehicle_node.cpp
+  src/core/input_health_monitor.cpp
   src/get_config.cpp
   src/fault_codes.cpp
   src/report_struct.cpp
+  src/mqtt/mqtt_reporter.cpp
   src/can/can_decoder.cpp)
 
 ament_target_dependencies(
diff --git a/src/communication/mqtt_report/include/mqtt_report/can/can_decoder.h b/src/communication/mqtt_report/include/mqtt_report/can/can_decoder.h
index 62b8cd9..d89e736 100644
--- a/src/communication/mqtt_report/include/mqtt_report/can/can_decoder.h
+++ b/src/communication/mqtt_report/include/mqtt_report/can/can_decoder.h
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include "mqtt_report/vehicle_context.h"
+#include "mqtt_report/core/vehicle_context.h"
 #include "sweeper_interfaces/msg/can_frame.hpp"
 
 namespace sweeperMsg = sweeper_interfaces::msg;
diff --git a/src/communication/mqtt_report/include/mqtt_report/core/input_health_monitor.h b/src/communication/mqtt_report/include/mqtt_report/core/input_health_monitor.h
new file mode 100644
index 0000000..663e4da
--- /dev/null
+++ b/src/communication/mqtt_report/include/mqtt_report/core/input_health_monitor.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <cstdint>
+#include <rclcpp/logger.hpp>
+
+struct InputMonitor
+{
+    bool ok = false;
+    bool sticky = false;
+    int64_t last_rx_ts = 0;
+    int64_t last_warn_ts = 0;
+};
+
+class InputHealthMonitor
+{
+   public:
+    InputHealthMonitor();
+
+    void on_identity_rx(int64_t now);
+    void on_gps_rx(int64_t now);
+    void on_can_rx(int64_t now);
+
+    void check(rclcpp::Logger logger, int64_t now, bool mqtt_connected);
+
+   private:
+    void check_input(const char* name, InputMonitor& mon, int64_t now, int64_t timeout_ms);
+
+   private:
+    InputMonitor identity_{false, true};
+    InputMonitor gps_;
+    InputMonitor can_;
+};
diff --git a/src/communication/mqtt_report/include/mqtt_report/mqtt/mqtt_reporter.h b/src/communication/mqtt_report/include/mqtt_report/mqtt/mqtt_reporter.h
new file mode 100644
index 0000000..b6beca3
--- /dev/null
+++ b/src/communication/mqtt_report/include/mqtt_report/mqtt/mqtt_reporter.h
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <string>
+
+#include "mqtt_report/core/vehicle_context.h"
+#include "mqtt_report/get_config.h"
+#include "mqtt_report/mqtt_client.hpp"
+
+class MqttReporter
+{
+   public:
+    MqttReporter(VehicleContext& ctx, MQTTClientWrapper& mqtt, const Config& config);
+
+    void publish_info();
+    void publish_gps();
+    void publish_faults();
+
+   private:
+    std::string make_topic(const std::string& tpl, const std::string& vid) const;
+
+   private:
+    VehicleContext& ctx_;
+    MQTTClientWrapper& mqtt_;
+    const Config& config_;
+};
diff --git a/src/communication/mqtt_report/src/core/input_health_monitor.cpp b/src/communication/mqtt_report/src/core/input_health_monitor.cpp
new file mode 100644
index 0000000..4f946ab
--- /dev/null
+++ b/src/communication/mqtt_report/src/core/input_health_monitor.cpp
@@ -0,0 +1,60 @@
+#include "mqtt_report/core/input_health_monitor.h"
+
+#include <rclcpp/rclcpp.hpp>
+
+static constexpr int64_t WARN_INTERVAL_MS = 10 * 1000;
+static constexpr int64_t IDENTITY_TIMEOUT_MS = 15 * 1000;
+static constexpr int64_t GPS_TIMEOUT_MS = 5 * 1000;
+static constexpr int64_t CAN_TIMEOUT_MS = 3 * 1000;
+
+InputHealthMonitor::InputHealthMonitor() { identity_.sticky = true; }
+
+void InputHealthMonitor::on_identity_rx(int64_t now)
+{
+    identity_.ok = true;
+    identity_.last_rx_ts = now;
+}
+
+void InputHealthMonitor::on_gps_rx(int64_t now)
+{
+    gps_.ok = true;
+    gps_.last_rx_ts = now;
+}
+
+void InputHealthMonitor::on_can_rx(int64_t now)
+{
+    can_.ok = true;
+    can_.last_rx_ts = now;
+}
+
+void InputHealthMonitor::check(rclcpp::Logger logger, int64_t now, bool mqtt_connected)
+{
+    if (!mqtt_connected)
+    {
+        RCLCPP_WARN(logger, "MQTT connection lost.");
+    }
+
+    check_input("vehicle identity (/vehicle/identity)", identity_, now, IDENTITY_TIMEOUT_MS);
+    check_input("GPS (/rtk_message)", gps_, now, GPS_TIMEOUT_MS);
+    check_input("CAN (/can_data)", can_, now, CAN_TIMEOUT_MS);
+}
+
+void InputHealthMonitor::check_input(const char* name, InputMonitor& mon, int64_t now, int64_t timeout_ms)
+{
+    if (mon.sticky && mon.ok) return;
+
+    if (mon.ok && now - mon.last_rx_ts > timeout_ms)
+    {
+        mon.ok = false;
+        RCLCPP_WARN(rclcpp::get_logger("input_monitor"), "%s timeout (%ld ms without data).", name,
+                    now - mon.last_rx_ts);
+        mon.last_warn_ts = now;
+        return;
+    }
+
+    if (!mon.ok && now - mon.last_warn_ts > WARN_INTERVAL_MS)
+    {
+        RCLCPP_WARN(rclcpp::get_logger("input_monitor"), "Waiting for %s...", name);
+        mon.last_warn_ts = now;
+    }
+}
diff --git a/src/communication/mqtt_report/src/mqtt/mqtt_reporter.cpp b/src/communication/mqtt_report/src/mqtt/mqtt_reporter.cpp
new file mode 100644
index 0000000..d68b0db
--- /dev/null
+++ b/src/communication/mqtt_report/src/mqtt/mqtt_reporter.cpp
@@ -0,0 +1,99 @@
+#include "mqtt_report/mqtt/mqtt_reporter.h"
+
+#include "mqtt_report/report_struct.h"
+
+MqttReporter::MqttReporter(VehicleContext& ctx, MQTTClientWrapper& mqtt, const Config& config)
+    : ctx_(ctx), mqtt_(mqtt), config_(config)
+{
+}
+
+std::string MqttReporter::make_topic(const std::string& tpl, const std::string& vid) const
+{
+    std::string topic = tpl;
+    const std::string key = "{vid}";
+    auto pos = topic.find(key);
+    if (pos != std::string::npos)
+    {
+        topic.replace(pos, key.size(), vid);
+    }
+    return topic;
+}
+
+void MqttReporter::publish_info()
+{
+    std::string imei, vid;
+    {
+        std::lock_guard<std::mutex> lock(ctx_.mtx);
+        if (!ctx_.ready) return;
+        imei = ctx_.imei;
+        vid = ctx_.vid;
+        ctx_.info.timestamp = getCurrentTimestampMs();
+    }
+
+    GeneralMsg snapshot;
+    {
+        std::lock_guard<std::mutex> lock(ctx_.mtx);
+        snapshot = ctx_.info;
+    }
+
+    ordered_json j;
+    j["imei"] = imei;
+    j["power"] = snapshot.power;
+    j["chargeStatus"] = snapshot.chargeStatus;
+    j["gear"] = snapshot.gear;
+    j["speed"] = snapshot.speed;
+    j["steeringAngle"] = snapshot.steeringAngle;
+    j["motorTemp"] = snapshot.motorTemp;
+    j["controllerTemp"] = snapshot.controllerTemp;
+    j["timestamp"] = snapshot.timestamp;
+
+    mqtt_.publish(make_topic(config_.info_topic_template, vid), j.dump(), 1);
+}
+
+void MqttReporter::publish_gps()
+{
+    std::string imei, vid;
+    GpsMsg gps;
+
+    {
+        std::lock_guard<std::mutex> lock(ctx_.mtx);
+        if (!ctx_.ready || !ctx_.gps.valid) return;
+        imei = ctx_.imei;
+        vid = ctx_.vid;
+        gps = ctx_.gps;
+    }
+
+    ordered_json j;
+    j["imei"] = imei;
+    j["lat"] = gps.lat;
+    j["lng"] = gps.lng;
+    j["course"] = gps.course;
+    j["mode"] = gps.mode;
+    j["gps_timestamp"] = gps.timestamp;
+    j["report_timestamp"] = getCurrentTimestampMs();
+
+    mqtt_.publish(make_topic(config_.gps_topic_template, vid), j.dump(), 1);
+}
+
+void MqttReporter::publish_faults()
+{
+    std::string vid;
+    {
+        std::lock_guard<std::mutex> lock(ctx_.mtx);
+        if (!ctx_.ready) return;
+        vid = ctx_.vid;
+    }
+
+    std::vector<int> codes;
+    {
+        std::lock_guard<std::mutex> lock(ctx_.mtx);
+        const auto& err_set = ctx_.errors.getAllErrorCodes();
+        codes.assign(err_set.begin(), err_set.end());
+    }
+
+    for (int code : codes)
+    {
+        mqtt_.publish(make_topic(config_.fault_topic_template, vid),
+                      generateFaultJson(code, vid, getCurrentTimestampMs()), 0);
+    }
+}
diff --git a/src/communication/mqtt_report/src/node/mqtt_vehicle_node.cpp b/src/communication/mqtt_report/src/node/mqtt_vehicle_node.cpp
index 4613613..e1dbd49 100644
--- a/src/communication/mqtt_report/src/node/mqtt_vehicle_node.cpp
+++ b/src/communication/mqtt_report/src/node/mqtt_vehicle_node.cpp
@@ -6,10 +6,11 @@
 #include <vector>
 
 #include "mqtt_report/can/can_decoder.h"
+#include "mqtt_report/core/input_health_monitor.h"
+#include "mqtt_report/core/vehicle_context.h"
 #include "mqtt_report/get_config.h"
-#include "mqtt_report/mqtt_client.hpp"
+#include "mqtt_report/mqtt/mqtt_reporter.h"
 #include "mqtt_report/report_struct.h"
-#include "mqtt_report/vehicle_context.h"
 #include "sweeper_interfaces/msg/can_frame.hpp"
 #include "sweeper_interfaces/msg/rtk.hpp"
 #include "sweeper_interfaces/msg/vehicle_identity.hpp"
@@ -19,99 +20,45 @@ using sweeper_interfaces::msg::VehicleIdentity;
 
 int mqtt_reconnect_interval = 5000;  // ms
 
-static constexpr int64_t WARN_INTERVAL_MS = 10 * 1000;  // 每 10s 警告一次
-static constexpr int64_t IDENTITY_TIMEOUT_MS = 15 * 1000;
-static constexpr int64_t GPS_TIMEOUT_MS = 5 * 1000;
-static constexpr int64_t CAN_TIMEOUT_MS = 3 * 1000;
-
-struct InputMonitor
-{
-    bool ok = false;
-    bool sticky = false;  // 是否一次成功就永久 OK
-    int64_t last_rx_ts = 0;
-    int64_t last_warn_ts = 0;
-};
-
-// ===================== JSON 打包 =====================
-static std::string pack_general_info_to_json(const GeneralMsg& msg, const std::string& imei)
-{
-    ordered_json j;
-    j["imei"] = imei;
-    j["power"] = msg.power;
-    j["chargeStatus"] = msg.chargeStatus;
-    j["gear"] = msg.gear;
-    j["speed"] = msg.speed;
-    j["steeringAngle"] = msg.steeringAngle;
-    j["motorTemp"] = msg.motorTemp;
-    j["controllerTemp"] = msg.controllerTemp;
-    j["timestamp"] = msg.timestamp;
-    return j.dump(-1);
-}
-
-static std::string pack_gps_to_json(const GpsMsg& gps, const std::string& imei)
-{
-    ordered_json j;
-    j["imei"] = imei;
-    j["lat"] = gps.lat;
-    j["lng"] = gps.lng;
-    j["course"] = gps.course;
-    j["mode"] = gps.mode;
-    j["gps_timestamp"] = gps.timestamp;
-    j["report_timestamp"] = getCurrentTimestampMs();
-    return j.dump(-1);
-}
-
-static std::string make_topic(const std::string& tpl, const std::string& vid)
-{
-    std::string topic = tpl;
-    const std::string key = "{vid}";
-    auto pos = topic.find(key);
-    if (pos != std::string::npos)
-    {
-        topic.replace(pos, key.size(), vid);
-    }
-    return topic;
-}
-
 // ===================== Node =====================
-class CanDataSubscriber : public rclcpp::Node
+class VehicleReportNode : public rclcpp::Node
 {
    public:
-    explicit CanDataSubscriber(const Config& cfg)
+    explicit VehicleReportNode(const Config& cfg)
         : Node("can_data_subscriber"),
           config_(cfg),
           mqtt_client_(cfg.mqtt_ip + ":" + std::to_string(cfg.mqtt_port), generate_mqtt_client_id(), cfg.mqtt_username,
                        cfg.mqtt_password, mqtt_reconnect_interval),
-          can_decoder_(ctx_)
+          can_decoder_(ctx_),
+          reporter_(ctx_, mqtt_client_, config_)
     {
         // CAN
         subscription_ = this->create_subscription<sweeperMsg::CanFrame>(
-            "can_data", 10, std::bind(&CanDataSubscriber::topic_callback, this, std::placeholders::_1));
+            "can_data", 10, std::bind(&VehicleReportNode::topic_callback, this, std::placeholders::_1));
 
         // Identity
         identity_sub_ = this->create_subscription<VehicleIdentity>(
             "/vehicle/identity", rclcpp::QoS(1).transient_local().reliable(),
-            std::bind(&CanDataSubscriber::identity_callback, this, std::placeholders::_1));
+            std::bind(&VehicleReportNode::identity_callback, this, std::placeholders::_1));
 
         // rtk
         rtk_sub_ = this->create_subscription<sweeper_interfaces::msg::Rtk>(
-            "rtk_message", 10, std::bind(&CanDataSubscriber::rtk_callback, this, std::placeholders::_1));
+            "rtk_message", 10, std::bind(&VehicleReportNode::rtk_callback, this, std::placeholders::_1));
 
         // Timers
-        info_timer_ = this->create_wall_timer(std::chrono::milliseconds(500),
-                                              std::bind(&CanDataSubscriber::info_timer_callback, this));
+        info_timer_ = this->create_wall_timer(std::chrono::milliseconds(500), [this]() { reporter_.publish_info(); });
 
-        gps_timer_ = this->create_wall_timer(std::chrono::milliseconds(200),
-                                             std::bind(&CanDataSubscriber::gps_timer_callback, this));
+        gps_timer_ = this->create_wall_timer(std::chrono::milliseconds(200), [this]() { reporter_.publish_gps(); });
 
-        fault_timer_ = this->create_wall_timer(std::chrono::milliseconds(500),
-                                               std::bind(&CanDataSubscriber::fault_timer_callback, this));
+        fault_timer_ =
+            this->create_wall_timer(std::chrono::milliseconds(500), [this]() { reporter_.publish_faults(); });
 
         connection_check_timer_ = this->create_wall_timer(
-            std::chrono::seconds(10), std::bind(&CanDataSubscriber::check_connection_callback, this));
+            std::chrono::seconds(10),
+            [this]() { health_.check(get_logger(), getCurrentTimestampMs(), mqtt_client_.isConnected()); });
     }
 
-    ~CanDataSubscriber() override
+    ~VehicleReportNode() override
     {
         if (info_timer_) info_timer_->cancel();
         if (gps_timer_) gps_timer_->cancel();
@@ -128,15 +75,11 @@ class CanDataSubscriber : public rclcpp::Node
         ctx_.vid = msg->vid;
         ctx_.ready = msg->ready;
 
+        RCLCPP_INFO(get_logger(), "Vehicle identity ready: IMEI=%s, VID=%s", msg->imei.c_str(), msg->vid.c_str());
+
         int64_t now = getCurrentTimestampMs();
 
-        if (!identity_mon_.ok)
-        {
-            RCLCPP_INFO(get_logger(), "Vehicle identity ready: IMEI=%s, VID=%s", ctx_.imei.c_str(), ctx_.vid.c_str());
-        }
-
-        identity_mon_.ok = true;
-        identity_mon_.last_rx_ts = now;
+        health_.on_identity_rx(now);
     }
 
     bool snapshot_identity(std::string& imei, std::string& vid)
@@ -148,99 +91,6 @@ class CanDataSubscriber : public rclcpp::Node
         return true;
     }
 
-    // ===================== timers =====================
-    void info_timer_callback()
-    {
-        std::string imei, vid;
-        if (!snapshot_identity(imei, vid)) return;
-
-        const std::string topic = make_topic(config_.info_topic_template, vid);
-
-        GeneralMsg snapshot;
-        {
-            std::lock_guard<std::mutex> lock(ctx_.mtx);
-            ctx_.info.timestamp = getCurrentTimestampMs();
-            snapshot = ctx_.info;
-        }
-
-        mqtt_client_.publish(topic, pack_general_info_to_json(snapshot, imei), 1);
-    }
-
-    void gps_timer_callback()
-    {
-        std::string imei, vid;
-        if (!snapshot_identity(imei, vid)) return;
-
-        GpsMsg snapshot;
-        {
-            std::lock_guard<std::mutex> lock(ctx_.mtx);
-            if (!ctx_.gps.valid) return;
-            snapshot = ctx_.gps;
-        }
-
-        const std::string topic = make_topic(config_.gps_topic_template, vid);
-
-        mqtt_client_.publish(topic, pack_gps_to_json(snapshot, imei), 1);
-    }
-
-    void fault_timer_callback()
-    {
-        std::string imei, vid;
-        if (!snapshot_identity(imei, vid)) return;
-
-        const std::string topic = make_topic(config_.fault_topic_template, vid);
-
-        std::vector<int> codes;
-        {
-            std::lock_guard<std::mutex> lock(ctx_.mtx);
-            const auto& err_set = ctx_.errors.getAllErrorCodes();
-            codes.assign(err_set.begin(), err_set.end());
-        }
-
-        for (int code : codes)
-        {
-            mqtt_client_.publish(topic, generateFaultJson(code, vid, getCurrentTimestampMs()), 0);
-        }
-    }
-
-    void check_connection_callback()
-    {
-        int64_t now = getCurrentTimestampMs();
-
-        if (!mqtt_client_.isConnected())
-        {
-            RCLCPP_WARN(get_logger(), "MQTT connection lost.");
-        }
-
-        check_input("vehicle identity (/vehicle/identity)", identity_mon_, now, IDENTITY_TIMEOUT_MS);
-
-        check_input("GPS (/rtk_message)", gps_mon_, now, GPS_TIMEOUT_MS);
-
-        check_input("CAN (/can_data)", can_mon_, now, CAN_TIMEOUT_MS);
-    }
-
-    void check_input(const char* name, InputMonitor& mon, int64_t now, int64_t timeout_ms)
-    {
-        // sticky 输入：一旦 OK，不再 timeout
-        if (mon.sticky && mon.ok) return;
-
-        // 从 OK → 不 OK（流断了）
-        if (mon.ok && now - mon.last_rx_ts > timeout_ms)
-        {
-            mon.ok = false;
-            RCLCPP_WARN(get_logger(), "%s timeout (%ld ms without data).", name, now - mon.last_rx_ts);
-            mon.last_warn_ts = now;
-            return;
-        }
-
-        // 一直不 OK → 低频 WARN
-        if (!mon.ok && now - mon.last_warn_ts > WARN_INTERVAL_MS)
-        {
-            RCLCPP_WARN(get_logger(), "Waiting for %s...", name);
-            mon.last_warn_ts = now;
-        }
-    }
-
     // ========== CAN ==========
     void topic_callback(const sweeperMsg::CanFrame::SharedPtr msg)
     {
@@ -248,13 +98,7 @@ class CanDataSubscriber : public rclcpp::Node
 
         int64_t now = getCurrentTimestampMs();
 
-        if (!can_mon_.ok)
-        {
-            RCLCPP_INFO(get_logger(), "CAN data stream active (/can_data).");
-        }
-
-        can_mon_.ok = true;
-        can_mon_.last_rx_ts = now;
+        health_.on_can_rx(now);
     }
 
     // ========== RTK ==========
@@ -280,13 +124,7 @@ class CanDataSubscriber : public rclcpp::Node
 
         int64_t now = ctx_.gps.timestamp;
 
-        if (!gps_mon_.ok)
-        {
-            RCLCPP_INFO(get_logger(), "GPS data stream active (/rtk_message).");
-        }
-
-        gps_mon_.ok = true;
-        gps_mon_.last_rx_ts = now;
+        health_.on_gps_rx(now);
     }
 
    private:
@@ -309,9 +147,9 @@ class CanDataSubscriber : public rclcpp::Node
     rclcpp::TimerBase::SharedPtr fault_timer_;
     rclcpp::TimerBase::SharedPtr connection_check_timer_;
 
-    InputMonitor identity_mon_{false, true};
-    InputMonitor gps_mon_;
-    InputMonitor can_mon_;
+    InputHealthMonitor health_;
+
+    MqttReporter reporter_;
 };
 
 // ===================== main =====================
@@ -349,7 +187,7 @@ int main(int argc, char** argv)
     RCLCPP_INFO(logger, "Topic templates: gps='%s', info='%s', fault='%s'", config.gps_topic_template.c_str(),
                 config.info_topic_template.c_str(), config.fault_topic_template.c_str());
 
-    auto node = std::make_shared<CanDataSubscriber>(config);
+    auto node = std::make_shared<VehicleReportNode>(config);
 
     rclcpp::spin(node);
     rclcpp::shutdown();