diff --git a/src/main/java/com/campus/water/entity/Device.java b/src/main/java/com/campus/water/entity/Device.java
index 46e2430..112d491 100644
--- a/src/main/java/com/campus/water/entity/Device.java
+++ b/src/main/java/com/campus/water/entity/Device.java
@@ -24,8 +24,8 @@ public class Device {
     @Column(name = "device_type", length = 50)
     private DeviceType deviceType;
 
-    @Column(name = "area_name", length = 36)
-    private String areaName;
+    @Column(name = "area_id", length = 36)
+    private String areaId;
 
     @Column(name = "install_location", length = 200)
     private String installLocation;
diff --git a/src/main/java/com/campus/water/mapper/AreaRepository.java b/src/main/java/com/campus/water/mapper/AreaRepository.java
index 1aab421..e40eb6f 100644
--- a/src/main/java/com/campus/water/mapper/AreaRepository.java
+++ b/src/main/java/com/campus/water/mapper/AreaRepository.java
@@ -56,6 +56,4 @@ public interface AreaRepository extends JpaRepository<Area, String> {
      */
     List<Area> findByAreaTypeAndManagerIsNullOrManagerEquals(Area.AreaType areaType, String emptyStr);
 
-    Optional<Area> findByAreaName(String areaName);
-
 }
\ No newline at end of file
diff --git a/src/main/java/com/campus/water/mapper/DeviceRepository.java b/src/main/java/com/campus/water/mapper/DeviceRepository.java
index fadcc8d..8e3b9aa 100644
--- a/src/main/java/com/campus/water/mapper/DeviceRepository.java
+++ b/src/main/java/com/campus/water/mapper/DeviceRepository.java
@@ -9,7 +9,7 @@ import java.util.List;
 @Repository
 public interface DeviceRepository extends JpaRepository<Device, String> {
     // 根据区域名称查询设备
-    List<Device> findByAreaName(String areaName);
+    List<Device> findByAreaId(String areaId);
 
     // 根据设备类型（枚举）查询
     List<Device> findByDeviceType(Device.DeviceType deviceType);
@@ -18,7 +18,7 @@ public interface DeviceRepository extends JpaRepository<Device, String> {
     List<Device> findByStatus(Device.DeviceStatus status);
 
     // 按区域和设备类型查询
-    List<Device> findByAreaNameAndDeviceType(String areaName, Device.DeviceType deviceType);
+    List<Device> findByAreaIdAndDeviceType(String areaId, Device.DeviceType deviceType);
 
     // 按安装位置模糊查询
     List<Device> findByInstallLocationContaining(String location);
diff --git a/src/main/java/com/campus/water/service/AlertTriggerService.java b/src/main/java/com/campus/water/service/AlertTriggerService.java
index 0b3e361..10e9f47 100644
--- a/src/main/java/com/campus/water/service/AlertTriggerService.java
+++ b/src/main/java/com/campus/water/service/AlertTriggerService.java
@@ -1,11 +1,9 @@
 package com.campus.water.service;
 
 import com.campus.water.entity.Alert;
-import com.campus.water.entity.Area;
 import com.campus.water.entity.Device;
 import com.campus.water.entity.WorkOrder;
 import com.campus.water.mapper.AlertRepository;
-import com.campus.water.mapper.AreaRepository;
 import com.campus.water.mapper.DeviceRepository;
 import com.campus.water.mapper.WorkOrderRepository;
 import com.campus.water.model.WaterMakerSensorData;
@@ -46,7 +44,6 @@ public class AlertTriggerService {
     private final AlertRepository alertRepository;
     private final WorkOrderRepository workOrderRepository;
     private final DeviceRepository deviceRepository;
-    private final AreaRepository areaRepository;
 
     /**
      * 检查制水机数据异常并触发告警
@@ -167,11 +164,8 @@ public class AlertTriggerService {
     private void createAlertAndWorkOrder(String deviceId, String alertType,
                                          Alert.AlertLevel level, String message,
                                          WorkOrder.OrderType orderType) {
-        // 1. 获取设备的片区名称
-        String areaName = getDeviceAreaName(deviceId);
-
-        // 2. 关键步骤：通过片区名称匹配获取对应的areaId（保留原有area_id逻辑）
-        String areaId = getAreaIdByAreaName(areaName);
+        // 获取设备所在区域（用于工单分配）
+        String areaId = getDeviceAreaId(deviceId);
 
         // 1. 创建告警记录
         Alert alert = new Alert();
@@ -225,26 +219,20 @@ public class AlertTriggerService {
     /**
      * 获取设备所在区域ID（新增超时控制，避免查询阻塞）
      */
-    /**
-     * 第一步：获取设备的片区名称（从修改后的Device表中获取）
-     */
-    private String getDeviceAreaName(String deviceId) {
-        Device device = deviceRepository.findById(deviceId)
-                .orElseThrow(() -> new RuntimeException("设备不存在：" + deviceId));
-        return device.getAreaName(); // 从Device获取areaName（已修改后的字段）
-    }
-
-    /**
-     * 第二步：新增方法 - 通过片区名称匹配获取对应的areaId
-     */
-    private String getAreaIdByAreaName(String areaName) {
-        if (areaName == null || areaName.trim().isEmpty()) {
-            throw new RuntimeException("片区名称不能为空，无法匹配片区ID");
+    public String getDeviceAreaId(String deviceId) {
+        try {
+            Optional<Device> deviceOpt = deviceRepository.findById(deviceId);
+            String areaId = deviceOpt.map(Device::getAreaId).orElse(null);
+            // 空值兜底：null/空字符串→unknown
+            if (areaId == null || areaId.trim().isEmpty()) {
+                areaId = "unknown";
+                log.warn("设备{}的area_id为空/设备不存在，兜底为unknown", deviceId);
+            }
+            return areaId;
+        } catch (Exception e) { // 捕获所有数据库异常
+            log.error("获取设备{}的area_id失败（数据库异常）", deviceId, e);
+            return "unknown"; // 异常时兜底
         }
-        // 通过片区名称查询片区信息，获取对应的areaId
-        Area area = areaRepository.findByAreaName(areaName)
-                .orElseThrow(() -> new RuntimeException("未查询到对应片区ID，片区名称：" + areaName));
-        return area.getAreaId(); // 返回原有保留的areaId
     }
     /**
      * 生成唯一工单ID（WO+时间戳+随机数）
diff --git a/src/main/java/com/campus/water/service/DeviceService.java b/src/main/java/com/campus/water/service/DeviceService.java
index f611bdd..20e699e 100644
--- a/src/main/java/com/campus/water/service/DeviceService.java
+++ b/src/main/java/com/campus/water/service/DeviceService.java
@@ -94,11 +94,11 @@ public class DeviceService {
     /**
      * 根据条件查询设备列表
      */
-    public List<Device> queryDevices(String areaName, DeviceType deviceType, DeviceStatus status) {
-        if (areaName != null && deviceType != null) {
-            return deviceRepository.findByAreaNameAndDeviceType(areaName, deviceType);
-        } else if (areaName != null) {
-            return deviceRepository.findByAreaName (areaName);
+    public List<Device> queryDevices(String areaId, DeviceType deviceType, DeviceStatus status) {
+        if (areaId != null && deviceType != null) {
+            return deviceRepository.findByAreaIdAndDeviceType(areaId, deviceType);
+        } else if (areaId != null) {
+            return deviceRepository.findByAreaId (areaId);
         } else if (deviceType != null) {
             return deviceRepository.findByDeviceType(deviceType);
         } else if (status != null) {
@@ -111,28 +111,28 @@ public class DeviceService {
     /**
      * 关联设备与终端
      */
-    // ========== 改造：原有bindTerminal方法，添加areaName参数和校验 ==========
+    // ========== 改造：原有bindTerminal方法，添加areaId参数和校验 ==========
     @Transactional
-    public DeviceTerminalMapping bindTerminal(String deviceId, String terminalId, String terminalName, String areaName) {
+    public DeviceTerminalMapping bindTerminal(String deviceId, String terminalId, String terminalName, String areaId) {
         // 1. 校验片区非空（终端必须归属片区）
-        if (areaName == null || areaName.trim().isEmpty()) {
+        if (areaId == null || areaId.trim().isEmpty()) {
             throw new RuntimeException("片区ID不能为空，请先选择片区");
         }
         // 2. 校验设备存在且属于该片区的供水机
-        validateDeviceBelongsToArea(deviceId, areaName);
+        validateDeviceBelongsToArea(deviceId, areaId);
         // 3. 检查终端是否已绑定（原有逻辑保留）
         Optional<DeviceTerminalMapping> existing = terminalMappingRepository.findByTerminalId(terminalId);
         if (existing.isPresent()) {
             throw new RuntimeException("终端已绑定设备：" + existing.get().getDeviceId());
         }
-        // 4. 构建映射对象（新增设置areaName）
+        // 4. 构建映射对象（新增设置areaId）
         DeviceTerminalMapping mapping = new DeviceTerminalMapping();
         mapping.setDeviceId(deviceId);
         mapping.setTerminalId(terminalId);
         mapping.setTerminalName(terminalName);
         mapping.setTerminalStatus(DeviceTerminalMapping.TerminalStatus.active);
         mapping.setInstallDate(LocalDate.now());
-        mapping.setAreaId(mapping.getAreaId()); // 保存终端所属片区
+        mapping.setAreaId(areaId); // 保存终端所属片区
         return terminalMappingRepository.save(mapping);
     }
 
@@ -227,17 +227,17 @@ public class DeviceService {
     }
 
     // ========== 新增1：查询指定片区的所有供水机 ==========
-    public List<Device> getWaterSuppliesByArea(String areaName) {
+    public List<Device> getWaterSuppliesByArea(String areaId) {
         // 1. 校验片区ID非空
-        if (areaName == null || areaName.trim().isEmpty()) {
+        if (areaId == null || areaId.trim().isEmpty()) {
             throw new RuntimeException("片区ID不能为空");
         }
         // 2. 查询该片区下类型为供水机的设备
-        return deviceRepository.findByAreaNameAndDeviceType(areaName, Device.DeviceType.water_supply);
+        return deviceRepository.findByAreaIdAndDeviceType(areaId, Device.DeviceType.water_supply);
     }
 
     // ========== 新增2：校验设备是否属于指定片区 ==========
-    public void validateDeviceBelongsToArea(String deviceId, String areaName) {
+    public void validateDeviceBelongsToArea(String deviceId, String areaId) {
         // 1. 校验设备存在
         Device device = getDeviceById(deviceId);
         // 2. 校验设备是供水机
@@ -245,8 +245,8 @@ public class DeviceService {
             throw new RuntimeException("只能关联供水机设备，当前设备类型不合法");
         }
         // 3. 校验设备所属片区与选中片区一致
-        if (!areaName.equals(device.getAreaName())) {
-            throw new RuntimeException("该供水机不属于所选片区（设备所属片区：" + device.getAreaName() + "）");
+        if (!areaId.equals(device.getAreaId())) {
+            throw new RuntimeException("该供水机不属于所选片区（设备所属片区：" + device.getAreaId() + "）");
         }
     }