diff --git a/src/main/java/com/campus/water/controller/web/AreaController.java b/src/main/java/com/campus/water/controller/web/AreaController.java
index 6acf470..d303526 100644
--- a/src/main/java/com/campus/water/controller/web/AreaController.java
+++ b/src/main/java/com/campus/water/controller/web/AreaController.java
@@ -2,6 +2,7 @@ package com.campus.water.controller.web;
 
 import com.campus.water.entity.Area;
 import com.campus.water.service.AreaService;
+import com.campus.water.entity.vo.AreaDeviceStatsVO;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
@@ -148,4 +149,47 @@ public class AreaController {
                     .body(buildResponse(500, "查询区域详情失败：" + e.getMessage(), null));
         }
     }
+
+    /**
+     * 获取指定片区设备统计
+     * 权限：超级管理员/区域管理员（与新增/修改区域权限一致）
+     * 响应：校区返回自身数据，市区返回下属校区汇总数据
+     */
+    @GetMapping("/device-stats/{areaId}")
+    @PreAuthorize("hasAnyRole('SUPER_ADMIN', 'AREA_ADMIN')")
+    public ResponseEntity<Map<String, Object>> getAreaDeviceStats(@PathVariable String areaId) {
+        try {
+            AreaDeviceStatsVO statsVO = areaService.getAreaDeviceStats(areaId);
+            return ResponseEntity.ok(buildResponse(200, "统计成功", statsVO));
+        } catch (RuntimeException e) {
+            // 业务异常（片区不存在、参数错误等）返回400
+            return ResponseEntity.badRequest().body(buildResponse(400, e.getMessage(), null));
+        } catch (Exception e) {
+            // 系统异常返回500
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .body(buildResponse(500, "统计片区设备失败：" + e.getMessage(), null));
+        }
+    }
+
+    /**
+     * 获取市区下所有校区单独统计
+     * 权限：超级管理员/区域管理员（与新增/修改区域权限一致）
+     * 响应：返回该市区下每个校区的设备统计，不进行汇总
+     */
+    @GetMapping("/device-stats/city/{cityId}/campuses")
+    @PreAuthorize("hasAnyRole('SUPER_ADMIN', 'AREA_ADMIN')")
+    public ResponseEntity<Map<String, Object>> getCampusDeviceStatsUnderCity(@PathVariable String cityId) {
+        try {
+            List<AreaDeviceStatsVO> statsVOList = areaService.getCampusDeviceStatsUnderCity(cityId);
+            return ResponseEntity.ok(buildResponse(200, "统计成功", statsVOList));
+        } catch (RuntimeException e) {
+            // 业务异常（非市区、市区不存在等）返回400
+            return ResponseEntity.badRequest().body(buildResponse(400, e.getMessage(), null));
+        } catch (Exception e) {
+            // 系统异常返回500
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                    .body(buildResponse(500, "统计市区下属校区设备失败：" + e.getMessage(), null));
+        }
+    }
+
 }
\ No newline at end of file
diff --git a/src/main/java/com/campus/water/entity/vo/AreaDeviceStatsVO.java b/src/main/java/com/campus/water/entity/vo/AreaDeviceStatsVO.java
new file mode 100644
index 0000000..5d332c2
--- /dev/null
+++ b/src/main/java/com/campus/water/entity/vo/AreaDeviceStatsVO.java
@@ -0,0 +1,16 @@
+package com.campus.water.entity.vo;
+
+import lombok.Data;
+
+/**
+ * 片区设备统计VO（适配现有实体，无新增依赖）
+ */
+@Data
+public class AreaDeviceStatsVO {
+    private String areaId; // 对应Area.areaId
+    private String areaName; // 对应Area.areaName
+    private String areaTypeDesc; // 对应Area.AreaType.desc（市区/校园）
+    private int waterMakerCount; // 制水机数量
+    private int waterSupplyCount; // 供水机数量
+    private int terminalCount; // 终端数量（基于DeviceTerminalMapping）
+}
\ 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 ab8db1d..82f5963 100644
--- a/src/main/java/com/campus/water/mapper/DeviceRepository.java
+++ b/src/main/java/com/campus/water/mapper/DeviceRepository.java
@@ -48,4 +48,6 @@ public interface DeviceRepository extends JpaRepository<Device, String> {
 
     // 按设备类型加载加载设备（支持区域筛选）
     List<Device> findByDeviceTypeAndAreaId(Device.DeviceType deviceType, String areaId);
+
+    long countByAreaIdAndDeviceType(String areaId, Device.DeviceType deviceType);
 }
\ No newline at end of file
diff --git a/src/main/java/com/campus/water/mapper/DeviceTerminalMappingRepository.java b/src/main/java/com/campus/water/mapper/DeviceTerminalMappingRepository.java
index 69e7a36..5a53e54 100644
--- a/src/main/java/com/campus/water/mapper/DeviceTerminalMappingRepository.java
+++ b/src/main/java/com/campus/water/mapper/DeviceTerminalMappingRepository.java
@@ -30,4 +30,6 @@ public interface DeviceTerminalMappingRepository extends JpaRepository<DeviceTer
     // 3. 按终端ID删除所有关联映射（删除终端时级联清理映射数据）
     void deleteByTerminalId(String terminalId);
 
+    long countByAreaId(String areaId);
+
 }
\ No newline at end of file
diff --git a/src/main/java/com/campus/water/service/AreaService.java b/src/main/java/com/campus/water/service/AreaService.java
index 0121db1..7aaaddd 100644
--- a/src/main/java/com/campus/water/service/AreaService.java
+++ b/src/main/java/com/campus/water/service/AreaService.java
@@ -1,10 +1,14 @@
 package com.campus.water.service;
 
 import com.campus.water.entity.Area;
+import com.campus.water.entity.Device;
 import com.campus.water.mapper.AreaRepository;
 import com.campus.water.entity.Admin;
 import com.campus.water.mapper.AdminRepository;
+import com.campus.water.mapper.DeviceRepository;
+import com.campus.water.mapper.DeviceTerminalMappingRepository;
 import com.campus.water.security.RoleConstants;
+import com.campus.water.entity.vo.AreaDeviceStatsVO;
 import org.springframework.beans.factory.annotation.Autowired;
 import java.util.List;
 import org.springframework.stereotype.Service;
@@ -13,6 +17,7 @@ import org.springframework.transaction.annotation.Transactional;
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
+import java.util.stream.Collectors;
 
 /**
  * 区域管理服务类
@@ -26,10 +31,17 @@ public class AreaService {
     // 新增：管理员仓库注入
     private final AdminRepository adminRepository;
 
-    // 改造构造器，添加AdminRepository参数
-    public AreaService(AreaRepository areaRepository, AdminRepository adminRepository) {
+    // 新增：注入现有设备、终端映射Repository（无新增Mapper方法）
+    private final DeviceRepository deviceRepository;
+    private final DeviceTerminalMappingRepository deviceTerminalMappingRepository;
+
+    public AreaService(AreaRepository areaRepository, AdminRepository adminRepository,
+                       DeviceRepository deviceRepository,
+                       DeviceTerminalMappingRepository deviceTerminalMappingRepository) {
         this.areaRepository = areaRepository;
         this.adminRepository = adminRepository;
+        this.deviceRepository = deviceRepository;
+        this.deviceTerminalMappingRepository = deviceTerminalMappingRepository;
     }
 
     /**
@@ -218,4 +230,106 @@ public class AreaService {
         }
     }
 
+
+    /**
+     * 获取指定片区的设备统计（校区：自身数据；市区：自身+下属所有校区汇总数据）
+     * @param areaId 片区ID（市区/校园）
+     * @return 片区设备统计结果（适配现有实体）
+     */
+    @Transactional(readOnly = true) // 只读事务提升查询性能，不修改数据
+    public AreaDeviceStatsVO getAreaDeviceStats(String areaId) {
+        // 1. 校验片区是否存在，获取片区基础信息
+        Area targetArea = getAreaById(areaId);
+        AreaDeviceStatsVO statsVO = new AreaDeviceStatsVO();
+
+        // 2. 填充片区基础信息（复用Area实体字段）
+        statsVO.setAreaId(targetArea.getAreaId());
+        statsVO.setAreaName(targetArea.getAreaName());
+        statsVO.setAreaTypeDesc(targetArea.getAreaType().getDesc());
+
+        // 3. 区分片区类型执行统计（核心逻辑，复用现有Mapper方法）
+        if (Area.AreaType.campus.equals(targetArea.getAreaType())) {
+            // 校区：仅统计自身关联的设备/终端
+            fillSelfDeviceStats(statsVO, areaId);
+        } else if (Area.AreaType.zone.equals(targetArea.getAreaType())) {
+            // 市区：统计自身 + 下属所有校区的汇总数据
+            fillCityTotalDeviceStats(statsVO, areaId);
+        }
+
+        return statsVO;
+    }
+
+    /**
+     * 填充单个片区（校区/市区自身）的设备统计数据（复用现有Mapper的count方法）
+     * @param statsVO 统计结果VO
+     * @param areaId  片区ID
+     */
+    private void fillSelfDeviceStats(AreaDeviceStatsVO statsVO, String areaId) {
+        // 复用DeviceRepository.countByAreaIdAndDeviceType（已存在，无需新增）
+        long waterMakerCount = deviceRepository.countByAreaIdAndDeviceType(
+                areaId, Device.DeviceType.water_maker); // 假设Device枚举包含WATER_MAKER/WATER_SUPPLY
+        long waterSupplyCount = deviceRepository.countByAreaIdAndDeviceType(
+                areaId, Device.DeviceType.water_supply);
+
+        // 复用DeviceTerminalMappingRepository.countByAreaId（已存在，无需新增）
+        long terminalCount = deviceTerminalMappingRepository.countByAreaId(areaId);
+
+        // 赋值到VO（强转int，若数量过大可改为long，兼容现有数据）
+        statsVO.setWaterMakerCount((int) waterMakerCount);
+        statsVO.setWaterSupplyCount((int) waterSupplyCount);
+        statsVO.setTerminalCount((int) terminalCount);
+    }
+
+    /**
+     * 填充市区的总设备统计数据（仅汇总下属所有校区，市区自身无设备/终端）
+     * @param statsVO 统计结果VO
+     * @param cityId  市区ID
+     */
+    private void fillCityTotalDeviceStats(AreaDeviceStatsVO statsVO, String cityId) {
+        // 第一步：获取市区下属所有校区的ID列表（复用现有getCampusesByCityId方法）
+        List<Area> campusList = getCampusesByCityId(cityId);
+        List<String> campusIds = campusList.stream()
+                .map(Area::getAreaId)
+                .collect(Collectors.toList());
+
+        // 第二步：汇总下属所有校区的设备/终端数量（循环复用现有count方法，适配现有Mapper）
+        long campusWaterMaker = 0;
+        long campusWaterSupply = 0;
+        long campusTerminal = 0;
+        if (!campusIds.isEmpty()) {
+            for (String campusId : campusIds) {
+                campusWaterMaker += deviceRepository.countByAreaIdAndDeviceType(campusId, Device.DeviceType.water_maker);
+                campusWaterSupply += deviceRepository.countByAreaIdAndDeviceType(campusId, Device.DeviceType.water_supply);
+                campusTerminal += deviceTerminalMappingRepository.countByAreaId(campusId);
+            }
+        }
+
+        // 第三步：直接赋值校区汇总数据（市区自身无数据）
+        statsVO.setWaterMakerCount((int) campusWaterMaker);
+        statsVO.setWaterSupplyCount((int) campusWaterSupply);
+        statsVO.setTerminalCount((int) campusTerminal);
+    }
+
+    /**
+     * 获取指定市区下所有校区的单独设备统计（每个校区各自的统计结果，不汇总）
+     * @param cityId 市区ID
+     * @return 校区统计列表（复用现有方法，无新增依赖）
+     */
+    @Transactional(readOnly = true)
+    public List<AreaDeviceStatsVO> getCampusDeviceStatsUnderCity(String cityId) {
+        // 1. 校验市区存在且类型正确
+        Area cityArea = getAreaById(cityId);
+        if (!Area.AreaType.zone.equals(cityArea.getAreaType())) {
+            throw new RuntimeException("指定区域不是市区，无法查询下属校区统计");
+        }
+
+        // 2. 获取下属所有校区（复用现有方法）
+        List<Area> campusList = getCampusesByCityId(cityId);
+
+        // 3. 逐个生成校区统计结果（复用getAreaDeviceStats方法）
+        return campusList.stream()
+                .map(campus -> getAreaDeviceStats(campus.getAreaId()))
+                .collect(Collectors.toList());
+    }
+
 }
\ No newline at end of file