diff --git a/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/proposal.md b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/proposal.md
new file mode 100644
index 0000000..8984ed1
--- /dev/null
+++ b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/proposal.md
@@ -0,0 +1,13 @@
+# Change: add g5 room status ip upsert
+
+## Why
+当前双写仅写入 onoffline_record_g5，未同步更新 G5 状态表 `room_status.room_status_moment_g5` 的 `ip` 字段，导致状态表与最新上报数据存在延迟。
+
+## What Changes
+- 新增 G5 状态表同步机制：按 `hotel_id + room_id` 查找目标行，并使用 `ON CONFLICT DO UPDATE` 更新 `ip`。
+- 同步时仅处理查找到的第一条匹配行（`LIMIT 1`）。
+- 无论 `ip` 是否变化都执行 upsert 更新，以触发数据库更新时间相关触发器。
+
+## Impact
+- Affected specs: `openspec/specs/onoffline/spec.md`
+- Affected code: `src/db/g5DatabaseManager.js`, `src/index.js`, `tests/g5DatabaseManager.test.js`
diff --git a/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/specs/onoffline/spec.md b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/specs/onoffline/spec.md
new file mode 100644
index 0000000..35fcb7e
--- /dev/null
+++ b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/specs/onoffline/spec.md
@@ -0,0 +1,19 @@
+## ADDED Requirements
+
+### Requirement: G5 状态表 IP 同步
+系统 SHALL 在处理并写入数据时，同步将对应设备的 `ip` 更新到 G5 状态表 `room_status.room_status_moment_g5`。
+
+#### Scenario: 按唯一键同步 IP
+- **GIVEN** 当前处理行包含 `hotel_id` 与 `room_id`
+- **WHEN** 执行 G5 状态表同步
+- **THEN** 系统按 `hotel_id + room_id` 查找状态表记录，并仅对查找到的第一条记录执行写入
+
+#### Scenario: 使用 upsert 触发更新
+- **GIVEN** 状态表已存在同键记录
+- **WHEN** 执行写入
+- **THEN** 系统使用 `ON CONFLICT (hotel_id, room_id) DO UPDATE` 更新 `ip`
+
+#### Scenario: IP 不变仍触发更新
+- **GIVEN** 新 `ip` 与库内 `ip` 相同
+- **WHEN** 执行状态表同步
+- **THEN** 系统仍执行更新语句，以触发表上的更新时间相关触发器
diff --git a/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/tasks.md b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/tasks.md
new file mode 100644
index 0000000..bbe3adb
--- /dev/null
+++ b/bls-onoffline-backend/openspec/changes/add-g5-room-status-ip-upsert/tasks.md
@@ -0,0 +1,10 @@
+## 1. Implementation
+- [x] 1.1 Add room status IP upsert method in G5 DB manager.
+- [x] 1.2 Trigger room status IP upsert in the main write path.
+- [x] 1.3 Add tests for status mapping and room status dedupe behavior.
+- [x] 1.4 Add OpenSpec delta for the new synchronization requirement.
+
+## 2. Validation
+- [x] 2.1 Run `npm run test`.
+- [x] 2.2 Run `npm run build`.
+- [x] 2.3 Run `openspec validate add-g5-room-status-ip-upsert --strict`.
diff --git a/bls-onoffline-backend/src/db/g5DatabaseManager.js b/bls-onoffline-backend/src/db/g5DatabaseManager.js
index 2378128..3c8ce05 100644
--- a/bls-onoffline-backend/src/db/g5DatabaseManager.js
+++ b/bls-onoffline-backend/src/db/g5DatabaseManager.js
@@ -18,6 +18,9 @@ const g5Columns = [
     'record_source'
 ];
 
+const roomStatusSyncSchema = 'room_status';
+const roomStatusSyncTable = 'room_status_moment_g5';
+
 export const mapCurrentStatusToG5Code = (value) => {
     if (value === 1 || value === 2 || value === 3) {
         return value;
@@ -30,6 +33,26 @@ export const mapCurrentStatusToG5Code = (value) => {
     return 0;
 };
 
+export const dedupeRoomStatusSyncRows = (rows) => {
+    const uniqueRows = new Map();
+    for (const row of rows || []) {
+        const hotelId = Number(row?.hotel_id);
+        const roomId = row?.room_id ?? null;
+        if (!Number.isFinite(hotelId) || roomId === null || roomId === '') {
+            continue;
+        }
+        const key = `${hotelId}@@${String(roomId)}`;
+        if (!uniqueRows.has(key)) {
+            uniqueRows.set(key, {
+                hotel_id: hotelId,
+                room_id: String(roomId),
+                ip: row?.ip ?? null
+            });
+        }
+    }
+    return Array.from(uniqueRows.values());
+};
+
 export class G5DatabaseManager {
     constructor(dbConfig) {
         if (!dbConfig.enabled) return;
@@ -94,6 +117,54 @@ export class G5DatabaseManager {
         }
     }
 
+        async upsertRoomStatusMomentIp(rows) {
+                if (!this.pool || !rows || rows.length === 0) {
+                        return;
+                }
+
+                const syncRows = dedupeRoomStatusSyncRows(rows);
+                if (syncRows.length === 0) {
+                        return;
+                }
+
+                const sql = `
+            WITH input_rows AS (
+                SELECT *
+                FROM UNNEST($1::int2[], $2::text[], $3::text[])
+                AS t(hotel_id, room_id, ip)
+            ), matched_rows AS (
+                SELECT i.hotel_id, i.room_id, i.ip
+                FROM input_rows i
+                JOIN LATERAL (
+                    SELECT r.hotel_id, r.room_id
+                    FROM ${roomStatusSyncSchema}.${roomStatusSyncTable} r
+                    WHERE r.hotel_id = i.hotel_id
+                        AND r.room_id = i.room_id
+                    LIMIT 1
+                ) m ON TRUE
+            )
+            INSERT INTO ${roomStatusSyncSchema}.${roomStatusSyncTable} (hotel_id, room_id, ip)
+            SELECT hotel_id, room_id, ip
+            FROM matched_rows
+            ON CONFLICT (hotel_id, room_id)
+            DO UPDATE SET ip = EXCLUDED.ip
+        `;
+
+                try {
+                        await this.pool.query(sql, [
+                                syncRows.map((row) => row.hotel_id),
+                                syncRows.map((row) => row.room_id),
+                                syncRows.map((row) => row.ip)
+                        ]);
+                } catch (error) {
+                        logger.error('G5 room_status_moment_g5 upsert failed', {
+                                error: error?.message,
+                                rowsLength: syncRows.length
+                        });
+                        throw error;
+                }
+        }
+
     async checkConnection() {
         if (!this.pool) return true; // Pretend it's ok if disabled
         let client;
diff --git a/bls-onoffline-backend/src/index.js b/bls-onoffline-backend/src/index.js
index e060710..ee87906 100644
--- a/bls-onoffline-backend/src/index.js
+++ b/bls-onoffline-backend/src/index.js
@@ -183,6 +183,9 @@ const bootstrap = async () => {
           promises.push(g5DbManager.insertRows({ schema: config.g5db.schema, table: config.g5db.table, rows }).catch(e => {
             logger.error('G5 Database insert failed but non-blocking', { error: e.message });
           }));
+          promises.push(g5DbManager.upsertRoomStatusMomentIp(rows).catch(e => {
+            logger.error('G5 room_status_moment_g5 upsert failed but non-blocking', { error: e.message });
+          }));
         }
         await Promise.all(promises);
 
@@ -213,6 +216,9 @@ const bootstrap = async () => {
       promises.push(g5DbManager.insertRows({ schema: config.g5db.schema, table: config.g5db.table, rows }).catch(e => {
         logger.error('G5 Database insert failed in insertOnce', { error: e.message });
       }));
+      promises.push(g5DbManager.upsertRoomStatusMomentIp(rows).catch(e => {
+        logger.error('G5 room_status_moment_g5 upsert failed in insertOnce', { error: e.message });
+      }));
     }
     await Promise.all(promises);
     metricCollector.increment('db_insert_count', 1);
diff --git a/bls-onoffline-backend/tests/g5DatabaseManager.test.js b/bls-onoffline-backend/tests/g5DatabaseManager.test.js
index 6eccd22..1b7387a 100644
--- a/bls-onoffline-backend/tests/g5DatabaseManager.test.js
+++ b/bls-onoffline-backend/tests/g5DatabaseManager.test.js
@@ -1,5 +1,5 @@
 import { describe, it, expect } from 'vitest';
-import { mapCurrentStatusToG5Code } from '../src/db/g5DatabaseManager.js';
+import { dedupeRoomStatusSyncRows, mapCurrentStatusToG5Code } from '../src/db/g5DatabaseManager.js';
 
 describe('G5 current_status mapping', () => {
   it('maps on/off/restart to numeric codes', () => {
@@ -12,4 +12,16 @@ describe('G5 current_status mapping', () => {
     expect(mapCurrentStatusToG5Code('idle')).toBe(0);
     expect(mapCurrentStatusToG5Code(null)).toBe(0);
   });
+
+  it('dedupes room status sync rows by hotel_id and room_id using first row', () => {
+    const rows = dedupeRoomStatusSyncRows([
+      { hotel_id: 101, room_id: '8001', ip: '10.0.0.1:1234' },
+      { hotel_id: 101, room_id: '8001', ip: '10.0.0.2:5678' },
+      { hotel_id: 101, room_id: '8002', ip: '10.0.0.3:9012' }
+    ]);
+
+    expect(rows).toHaveLength(2);
+    expect(rows[0]).toEqual({ hotel_id: 101, room_id: '8001', ip: '10.0.0.1:1234' });
+    expect(rows[1]).toEqual({ hotel_id: 101, room_id: '8002', ip: '10.0.0.3:9012' });
+  });
 });
diff --git a/docs/room_status_moment_g5.sql b/docs/room_status_moment_g5.sql
new file mode 100644
index 0000000..fcf2f50
--- /dev/null
+++ b/docs/room_status_moment_g5.sql
@@ -0,0 +1,91 @@
+/*
+ Navicat Premium Dump SQL
+
+ Source Server         : FnOS 80
+ Source Server Type    : PostgreSQL
+ Source Server Version : 150017 (150017)
+ Source Host           : 10.8.8.80:5434
+ Source Catalog        : log_platform
+ Source Schema         : room_status
+
+ Target Server Type    : PostgreSQL
+ Target Server Version : 150017 (150017)
+ File Encoding         : 65001
+
+ Date: 18/03/2026 10:55:09
+*/
+
+
+-- ----------------------------
+-- Table structure for room_status_moment_g5
+-- ----------------------------
+DROP TABLE IF EXISTS "room_status"."room_status_moment_g5";
+CREATE TABLE "room_status"."room_status_moment_g5" (
+  "hotel_id" int2 NOT NULL,
+  "room_id" text COLLATE "pg_catalog"."default" NOT NULL,
+  "device_id" text COLLATE "pg_catalog"."default" NOT NULL,
+  "ts_ms" int8 NOT NULL DEFAULT ((EXTRACT(epoch FROM clock_timestamp()) * (1000)::numeric))::bigint,
+  "sys_lock_status" int2,
+  "online_status" int2,
+  "launcher_version" text COLLATE "pg_catalog"."default",
+  "app_version" text COLLATE "pg_catalog"."default",
+  "config_version" text COLLATE "pg_catalog"."default",
+  "register_ts_ms" int8,
+  "upgrade_ts_ms" int8,
+  "config_ts_ms" int8,
+  "ip" text COLLATE "pg_catalog"."default",
+  "pms_status" int2,
+  "power_state" int2,
+  "cardless_state" int2,
+  "service_mask" int8,
+  "insert_card" int2,
+  "bright_g" int2,
+  "agreement_ver" text COLLATE "pg_catalog"."default",
+  "air_address" _text COLLATE "pg_catalog"."default",
+  "air_state" _int2,
+  "air_model" _int2,
+  "air_speed" _int2,
+  "air_set_temp" _int2,
+  "air_now_temp" _int2,
+  "air_solenoid_valve" _int2,
+  "elec_address" _text COLLATE "pg_catalog"."default",
+  "elec_voltage" _float8,
+  "elec_ampere" _float8,
+  "elec_power" _float8,
+  "elec_phase" _float8,
+  "elec_energy" _float8,
+  "elec_sum_energy" _float8,
+  "carbon_state" int2,
+  "dev_loops" jsonb,
+  "energy_carbon_sum" float8,
+  "energy_nocard_sum" float8,
+  "external_device" jsonb DEFAULT '{}'::jsonb,
+  "faulty_device_count" jsonb DEFAULT '{}'::jsonb
+)
+WITH (fillfactor=90)
+TABLESPACE "ts_hot"
+;
+
+-- ----------------------------
+-- Indexes structure for table room_status_moment_g5
+-- ----------------------------
+CREATE INDEX "idx_rsm_g5_dashboard_query" ON "room_status"."room_status_moment_g5" USING btree (
+  "hotel_id" "pg_catalog"."int2_ops" ASC NULLS LAST,
+  "online_status" "pg_catalog"."int2_ops" ASC NULLS LAST,
+  "power_state" "pg_catalog"."int2_ops" ASC NULLS LAST
+);
+
+-- ----------------------------
+-- Triggers structure for table room_status_moment_g5
+-- ----------------------------
+CREATE TRIGGER "trg_update_rsm_ts_ms" BEFORE UPDATE ON "room_status"."room_status_moment_g5"
+FOR EACH ROW
+EXECUTE PROCEDURE "room_status"."update_ts_ms_g5"();
+CREATE TRIGGER "trigger_room_status_change" AFTER UPDATE ON "room_status"."room_status_moment_g5"
+FOR EACH ROW
+EXECUTE PROCEDURE "room_status"."handle_room_status_change"();
+
+-- ----------------------------
+-- Primary Key structure for table room_status_moment_g5
+-- ----------------------------
+ALTER TABLE "room_status"."room_status_moment_g5" ADD CONSTRAINT "room_status_moment_g5_pkey" PRIMARY KEY ("hotel_id", "room_id");