diff --git a/DBNMQTTool/dbn_mqtt_tool/mqtt_client.py b/DBNMQTTool/dbn_mqtt_tool/mqtt_client.py
index 72ff6ca..c438743 100644
--- a/DBNMQTTool/dbn_mqtt_tool/mqtt_client.py
+++ b/DBNMQTTool/dbn_mqtt_tool/mqtt_client.py
@@ -68,14 +68,8 @@ class MqttClient:
             self._connected = True
             self._notify_status(True, "已连接到 Broker")
 
-            from .protocol import (
-                TOPIC_ALL_CONFIG_RESP, TOPIC_ALL_DATA_LOOP,
-                TOPIC_ALL_DATA_EVENT, TOPIC_ALL_STATUS
-            )
-            client.subscribe(TOPIC_ALL_CONFIG_RESP, qos=1)
-            client.subscribe(TOPIC_ALL_DATA_LOOP, qos=1)
-            client.subscribe(TOPIC_ALL_DATA_EVENT, qos=1)
-            client.subscribe(TOPIC_ALL_STATUS, qos=0)
+            from .protocol import TOPIC_ALL_DEVICE_UP
+            client.subscribe(TOPIC_ALL_DEVICE_UP, qos=1)
         else:
             self._connected = False
             self._notify_status(False, f"连接失败 (rc={rc})")
diff --git a/DBNMQTTool/dbn_mqtt_tool/protocol.py b/DBNMQTTool/dbn_mqtt_tool/protocol.py
index 8e2de64..797d685 100644
--- a/DBNMQTTool/dbn_mqtt_tool/protocol.py
+++ b/DBNMQTTool/dbn_mqtt_tool/protocol.py
@@ -1,7 +1,9 @@
 """
 DLD960 IoT MQTT 协议定义
 
-基于《DLD960_IoT_MQTT协议.md》V1.00
+基于《DLD960_IoT_MQTT协议.md》V1.01
+双主题结构：{sn}/down（服务器下发）、{sn}/up（设备上报）
+消息类型由 JSON `cmd` 字段区分。
 """
 
 import json
@@ -11,49 +13,32 @@ from dataclasses import dataclass, field, asdict
 
 
 # ============================================================
-# Topic 结构
+# Topic 结构（V1.01 — 双主题）
 # ============================================================
 
-def topic_config_set(dev_serial: str) -> str:
-    """服务器下发 — 设置配置"""
-    return f"dld960/{dev_serial}/srv/config/set"
+def topic_down(dev_serial: str) -> str:
+    """服务器下发 — 设备订阅此主题接收所有命令"""
+    return f"dld960/{dev_serial}/down"
 
 
-def topic_config_query(dev_serial: str) -> str:
-    """服务器下发 — 查询配置"""
-    return f"dld960/{dev_serial}/srv/config/query"
+def topic_up(dev_serial: str) -> str:
+    """设备上报 — 设备发布到此主题（数据、事件、心跳、响应）"""
+    return f"dld960/{dev_serial}/up"
 
 
-def topic_ctrl(dev_serial: str) -> str:
-    """服务器下发 — 控制命令"""
-    return f"dld960/{dev_serial}/srv/ctrl"
+# 保持向后兼容的别名（4.7 iot_topic_set 仍使用 topic_pub / topic_sub）
+def topic_dev_pub(dev_serial: str) -> str:
+    """设备发布主题（= topic_up）"""
+    return topic_up(dev_serial)
 
 
-def topic_config_resp(dev_serial: str) -> str:
-    """设备上报 — 配置响应"""
-    return f"dld960/{dev_serial}/dev/config/resp"
+def topic_dev_sub(dev_serial: str) -> str:
+    """设备订阅主题（= topic_down）"""
+    return topic_down(dev_serial)
 
 
-def topic_data_loop(dev_serial: str) -> str:
-    """设备上报 — 线圈数据"""
-    return f"dld960/{dev_serial}/dev/data/loop"
-
-
-def topic_data_event(dev_serial: str) -> str:
-    """设备上报 — 事件"""
-    return f"dld960/{dev_serial}/dev/data/event"
-
-
-def topic_status(dev_serial: str) -> str:
-    """设备上报 — 状态/心跳"""
-    return f"dld960/{dev_serial}/dev/status"
-
-
-# 订阅通配符（监听所有设备）
-TOPIC_ALL_CONFIG_RESP = "dld960/+/dev/config/resp"
-TOPIC_ALL_DATA_LOOP = "dld960/+/dev/data/loop"
-TOPIC_ALL_DATA_EVENT = "dld960/+/dev/data/event"
-TOPIC_ALL_STATUS = "dld960/+/dev/status"
+# 服务器端通配符订阅（监听所有设备）
+TOPIC_ALL_DEVICE_UP = "dld960/+/up"
 
 
 # ============================================================
@@ -158,15 +143,8 @@ def build_response(cmd: str, msg_id: int, code: int = 0, msg_text: str = "succes
 
 
 def get_topic_for_cmd(cmd: str, dev_serial: str) -> str:
-    """根据命令获取对应的下发 topic"""
-    if cmd in CONFIG_SET_COMMANDS:
-        return topic_config_set(dev_serial)
-    elif cmd in CONFIG_QUERY_COMMANDS:
-        return topic_config_query(dev_serial)
-    elif cmd in CTRL_COMMANDS:
-        return topic_ctrl(dev_serial)
-    else:
-        return topic_config_set(dev_serial)  # 默认
+    """获取命令对应的下发 topic。所有命令统一使用 topic_down"""
+    return topic_down(dev_serial)
 
 
 # ============================================================
diff --git a/DBNMQTTool/main.py b/DBNMQTTool/main.py
index a9713ea..99544a8 100644
--- a/DBNMQTTool/main.py
+++ b/DBNMQTTool/main.py
@@ -35,8 +35,7 @@ from dbn_mqtt_tool.protocol import (
     data_ssc_net_set, data_iot_net_set, data_iot_topic_set,
     data_pwd_verify, data_pwd_set,
     build_request, next_msg_id,
-    topic_config_set, topic_config_query, topic_ctrl,
-    topic_config_resp, topic_data_loop, topic_data_event, topic_status,
+    topic_down, topic_up,
 )
 
 class MainWindow(QMainWindow):
@@ -457,15 +456,15 @@ class MainWindow(QMainWindow):
 
     def _sim_send_loop(self):
         sn = self._sim_sn.text()
-        self._sim_publish(topic_data_loop(sn), self._sim_loop.toPlainText())
+        self._sim_publish(topic_up(sn), self._sim_loop.toPlainText())
 
     def _sim_send_event(self):
         sn = self._sim_sn.text()
-        self._sim_publish(topic_data_event(sn), self._sim_event.toPlainText())
+        self._sim_publish(topic_up(sn), self._sim_event.toPlainText())
 
     def _sim_send_hb(self):
         sn = self._sim_sn.text()
-        self._sim_publish(topic_status(sn), self._sim_hb.toPlainText())
+        self._sim_publish(topic_up(sn), self._sim_hb.toPlainText())
 
     def _sim_toggle_loop(self, checked: bool):
         if checked:
@@ -501,20 +500,20 @@ class MainWindow(QMainWindow):
         layout.addLayout(row1)
 
         # 服务器下发 topics
-        g1 = QGroupBox("服务器下发 Topic（可发布）")
+        g1 = QGroupBox("服务器下发 Topic → 设备订阅（可发布）")
         self._proto_srv_tree = QTreeWidget()
-        self._proto_srv_tree.setHeaderLabels(["Topic", "用途", "示例命令"])
-        self._proto_srv_tree.setRootIsDecorated(True)
+        self._proto_srv_tree.setHeaderLabels(["Topic", "说明"])
+        self._proto_srv_tree.setRootIsDecorated(False)
         self._proto_srv_tree.itemDoubleClicked.connect(self._proto_publish_item)
         g1l = QVBoxLayout(g1)
         g1l.addWidget(self._proto_srv_tree)
         layout.addWidget(g1)
 
         # 设备上报 topics
-        g2 = QGroupBox("设备上报 Topic（可订阅/发布）")
+        g2 = QGroupBox("设备上报 Topic → 服务器订阅（可发布/订阅）")
         self._proto_dev_tree = QTreeWidget()
-        self._proto_dev_tree.setHeaderLabels(["Topic", "用途"])
-        self._proto_dev_tree.setRootIsDecorated(True)
+        self._proto_dev_tree.setHeaderLabels(["Topic", "说明"])
+        self._proto_dev_tree.setRootIsDecorated(False)
         self._proto_dev_tree.itemDoubleClicked.connect(self._proto_publish_item)
         g2l = QVBoxLayout(g2)
         g2l.addWidget(self._proto_dev_tree)
@@ -545,38 +544,29 @@ class MainWindow(QMainWindow):
     def _refresh_proto_topics(self):
         sn = self._proto_sn.text().strip() or "{sn}"
 
-        # 服务器下发
+        # 服务器下发 — 单主题
         srv = self._proto_srv_tree
         srv.clear()
+        QTreeWidgetItem(srv, [topic_down(sn), "设备订阅此主题接收所有命令"])
 
-        def _add_srv(parent, name, tpl, desc, sample_cmd=""):
-            topic = tpl.format(sn=sn)
-            item = QTreeWidgetItem(parent or srv, [topic, desc, sample_cmd])
-            return item
-
-        root_set = _add_srv(None, "config/set", "dld960/{sn}/srv/config/set",
-                            "设置配置参数", "dev_serial_set / iot_net_set / loop_param_set")
-        root_query = _add_srv(None, "config/query", "dld960/{sn}/srv/config/query",
-                              "查询配置参数", "dev_info_query / ssc_net_query")
-        root_ctrl = _add_srv(None, "ctrl", "dld960/{sn}/srv/ctrl",
-                             "控制命令", "pwd_verify / factory_reset / device_reset")
-
-        # 设备上报
+        # 设备上报 — 单主题
         dev = self._proto_dev_tree
         dev.clear()
-        for name, tpl, desc in [
-            ("config/resp", "dld960/{sn}/dev/config/resp", "配置查询/设置响应"),
-            ("data/loop", "dld960/{sn}/dev/data/loop", "线圈传感数据上报"),
-            ("data/event", "dld960/{sn}/dev/data/event", "事件上报"),
-            ("status", "dld960/{sn}/dev/status", "设备状态/心跳"),
+        item = QTreeWidgetItem(dev, [topic_up(sn), "设备发布：loop_data / event_report / heartbeat / 命令响应"])
+        # 子条目列出 cmd 类型
+        for cmd_name, desc in [
+            ("loop_data", "线圈传感数据上报"),
+            ("event_report", "事件上报（有车/无车/故障）"),
+            ("heartbeat", "设备心跳"),
+            ("响应", "各命令查询/设置响应（msg_id 匹配）"),
         ]:
-            QTreeWidgetItem(dev, [tpl.format(sn=sn), desc])
-
-        srv.expandAll()
-        dev.expandAll()
+            QTreeWidgetItem(item, [f"  cmd={cmd_name}", desc])
 
     def _proto_publish_item(self, item: QTreeWidgetItem, col: int):
+        # 如果点中的是子条目（无有效 topic），取父条目的 topic
         topic = item.text(0)
+        if item.parent() and not topic.startswith("dld960/"):
+            topic = item.parent().text(0)
         self._proto_pub_topic.setText(topic)
         self._proto_payload.clear()
         self._notebook.setCurrentWidget(self._proto_payload.parent().parent())
@@ -764,7 +754,8 @@ class MainWindow(QMainWindow):
         cmd = payload.get("cmd", "")
         ts = datetime.fromtimestamp(payload.get("ts", 0)).strftime("%H:%M:%S")
 
-        if "/dev/config/resp" in topic:
+        # 响应类消息（含 code 字段）
+        if "code" in payload:
             code = payload.get("code", -1)
             pmsg = payload.get("msg", "")
             data = payload.get("data", {})
@@ -778,21 +769,21 @@ class MainWindow(QMainWindow):
             else:
                 self._show_json({"error": f"code={code} {pmsg} ({ERROR_MSGS.get(code, '?')})"})
 
-        elif "/dev/data/loop" in topic:
+        elif cmd == CMD_LOOP_DATA:
             data = payload.get("data", {})
             self._devmgr.update_loop_data(dev_serial, data)
             chs = len(data.get("channels", []))
             self._log(f"[{ts}] {dev_serial} ← loop_data ({chs} 通道)")
             self._append_text(self._loop_text, json.dumps(payload, indent=2, ensure_ascii=False))
 
-        elif "/dev/data/event" in topic:
+        elif cmd == CMD_EVENT_REPORT:
             data = payload.get("data", {})
             self._devmgr.update_event(dev_serial, data)
             evt_count = len(data.get("events", []))
             self._log(f"[{ts}] {dev_serial} ← event_report ({evt_count} 事件)")
             self._append_text(self._event_text, json.dumps(payload, indent=2, ensure_ascii=False))
 
-        elif "/dev/status" in topic:
+        elif cmd == CMD_HEARTBEAT:
             data = payload.get("data", {})
             self._devmgr.update_heartbeat(dev_serial, data)
             self._log(f"[{ts}] {dev_serial} ← heartbeat (uptime={data.get('uptime', 0)}s)")
diff --git a/docs/DLD960_IoT_MQTT协议.md b/docs/DLD960_IoT_MQTT协议.md
index dae46bf..c75429f 100644
--- a/docs/DLD960_IoT_MQTT协议.md
+++ b/docs/DLD960_IoT_MQTT协议.md
@@ -19,33 +19,30 @@
 
 ## 1.2 Topic 结构
 
+协议仅使用两个主题，所有消息类型通过 JSON 内 `cmd` 字段区分。
+
 ```
-dld960/{dev_serial}/{direction}/{category}[/{sub}]
+dld960/{dev_serial}/{direction}
 ```
 
 | 字段 | 说明 |
 |------|------|
 | `dev_serial` | 设备序列码（6字节十六进制字符串，如 `A1B2C3D4E5F6`） |
-| `direction` | `srv` = 服务器下发，`dev` = 设备上报 |
-| `category` | 消息类别 |
-| `sub` | 子类别（可选） |
+| `direction` | `down` = 服务器下发（设备订阅），`up` = 设备上报（服务器订阅） |
 
-### 1.2.1 服务器下发 Topic（设备订阅）
+### 1.2.1 服务器下发 Topic — `dld960/{sn}/down`
 
-| Topic | 说明 | 对应串口 CMD |
-|-------|------|-------------|
-| `dld960/{sn}/srv/config/set` | 设置配置参数 | 0x11, 0x13, 0x15, 0x63 |
-| `dld960/{sn}/srv/config/query` | 查询配置参数 | 0x10, 0x12, 0x14, 0x16, 0x64 |
-| `dld960/{sn}/srv/ctrl` | 控制命令 | 0x09, 0x1C, 0x1D, 0x1E, 0x1F, 0xC5 |
+设备订阅此主题，接收服务器下发的所有命令（配置设置、查询、控制等）。
+服务器发布到此主题。
 
-### 1.2.2 设备上报 Topic（服务器订阅）
+对应串口 CMD：0x09 ~ 0x1F, 0x63, 0x64, 0xC5 等。
 
-| Topic | 说明 | 对应串口 CMD |
-|-------|------|-------------|
-| `dld960/{sn}/dev/config/resp` | 配置查询/设置响应 | 各命令返回 |
-| `dld960/{sn}/dev/data/loop` | 线圈传感数据上报 | 0xC0 (SensType=0x0C) |
-| `dld960/{sn}/dev/data/event` | 事件上报（有车/无车、故障等） | — |
-| `dld960/{sn}/dev/status` | 设备状态（在线心跳、自检） | — |
+### 1.2.2 设备上报 Topic — `dld960/{sn}/up`
+
+设备发布到此主题，上报线圈数据、事件、心跳及命令响应。
+服务器订阅此主题接收所有设备上行消息。
+
+服务器端可订阅通配符 `dld960/+/up` 监听所有设备。
 
 ---
 
@@ -130,7 +127,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.1 更改设备序列码 `dev_serial_set`
 
-> Topic: `dld960/{sn}/srv/config/set`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -145,7 +142,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 }
 ```
 
-**响应：** Topic: `dld960/{sn}/dev/config/resp`
+**响应：** Topic: `dld960/{sn}/up`
 
 ```json
 {
@@ -159,7 +156,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.2 查询设备信息 `dev_info_query`
 
-> Topic: `dld960/{sn}/srv/config/query`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -213,7 +210,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.3 设置 SSC 网络配置 `ssc_net_set`
 
-> Topic: `dld960/{sn}/srv/config/set`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -256,7 +253,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.4 查询 SSC 网络配置 `ssc_net_query`
 
-> Topic: `dld960/{sn}/srv/config/query`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -272,7 +269,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.5 设置 IoT 网络配置 `iot_net_set`
 
-> Topic: `dld960/{sn}/srv/config/set`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -303,7 +300,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.6 查询 IoT 网络配置 `iot_net_query`
 
-> Topic: `dld960/{sn}/srv/config/query`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -319,7 +316,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.7 设置设备 Topic `iot_topic_set`
 
-> Topic: `dld960/{sn}/srv/config/set`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -340,7 +337,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.8 查询设备 Topic `iot_topic_query`
 
-> Topic: `dld960/{sn}/srv/config/query`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -356,7 +353,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.9 验证设备密码 `pwd_verify`
 
-> Topic: `dld960/{sn}/srv/ctrl`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -389,7 +386,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.10 设置设备密码 `pwd_set`
 
-> Topic: `dld960/{sn}/srv/ctrl`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -409,7 +406,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.11 设备出厂初始化 `factory_reset`
 
-> Topic: `dld960/{sn}/srv/ctrl`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -435,7 +432,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.12 设备复位 `device_reset`
 
-> Topic: `dld960/{sn}/srv/ctrl`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -451,7 +448,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.13 设置车检器多路参数 `loop_param_set`
 
-> Topic: `dld960/{sn}/srv/config/set`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -540,7 +537,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.14 读取车检器多路参数 `loop_param_query`
 
-> Topic: `dld960/{sn}/srv/config/query`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -591,7 +588,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 4.15 设置主动上报 `report_config`
 
-> Topic: `dld960/{sn}/srv/ctrl`
+> Topic: `dld960/{sn}/down`
 
 **请求：**
 
@@ -630,7 +627,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 5.1 线圈传感数据 `loop_data`
 
-> Topic: `dld960/{sn}/dev/data/loop`
+> Topic: `dld960/{sn}/up`
 > QoS: 0/1
 
 ```json
@@ -716,7 +713,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 5.2 事件上报 `event_report`
 
-> Topic: `dld960/{sn}/dev/data/event`
+> Topic: `dld960/{sn}/up`
 
 设备检测到事件时主动上报，非周期性。
 
@@ -756,7 +753,7 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 
 ## 5.3 设备心跳 `heartbeat`
 
-> Topic: `dld960/{sn}/dev/status`
+> Topic: `dld960/{sn}/up`
 > 周期：默认 60 秒
 
 ```json
@@ -787,3 +784,4 @@ dld960/{dev_serial}/{direction}/{category}[/{sub}]
 | 版本 | 修订时间 | 修订说明 | 修订人 |
 |------|----------|----------|--------|
 | V1.00 | 2026-06-22 | 初始版本，基于串口协议 V1.01 | wangfq |
+| V1.01 | 2026-07-07 | Topic 压缩为双主题（`{sn}/up` + `{sn}/down`），消息类型由 `cmd` 字段区分 | wangfq |