diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/IotDeviceController.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/IotDeviceController.java
index c7f4fe4b40..109f4b2787 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/IotDeviceController.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/IotDeviceController.java
@@ -51,6 +51,7 @@ public class IotDeviceController {
         return success(deviceService.createDevice(createReqVO));
     }
 
+
     @PutMapping("/update")
     @Operation(summary = "更新设备")
     @PreAuthorize("@ss.hasPermission('iot:device:update')")
@@ -59,7 +60,72 @@ public class IotDeviceController {
         return success(true);
     }
 
-    // TODO @芋艿：参考阿里云：1）绑定网关；2）解绑网关
+    @PutMapping("/bind-gateway")
+    @Operation(summary = "绑定子设备到网关")
+    @PreAuthorize("@ss.hasPermission('iot:device:update')")
+    public CommonResult<Boolean> bindDeviceGateway(@Valid @RequestBody IotDeviceBindGatewayReqVO reqVO) {
+        deviceService.bindDeviceGateway(reqVO.getIds(), reqVO.getGatewayId());
+        return success(true);
+    }
+
+    @PutMapping("/unbind-gateway")
+    @Operation(summary = "解绑子设备与网关")
+    @PreAuthorize("@ss.hasPermission('iot:device:update')")
+    public CommonResult<Boolean> unbindDeviceGateway(@Valid @RequestBody IotDeviceUnbindGatewayReqVO reqVO) {
+        deviceService.unbindDeviceGateway(reqVO.getIds());
+        return success(true);
+    }
+
+    @GetMapping("/sub-device-list")
+    @Operation(summary = "获取网关的子设备列表")
+    @Parameter(name = "gatewayId", description = "网关设备编号", required = true, example = "1")
+    @PreAuthorize("@ss.hasPermission('iot:device:query')")
+    public CommonResult<List<IotDeviceRespVO>> getSubDeviceList(@RequestParam("gatewayId") Long gatewayId) {
+        List<IotDeviceDO> list = deviceService.getDeviceListByGatewayId(gatewayId);
+        if (CollUtil.isEmpty(list)) {
+            return success(Collections.emptyList());
+        }
+
+        // 补充产品名称
+        Map<Long, IotProductDO> productMap = convertMap(productService.getProductList(), IotProductDO::getId);
+        return success(convertList(list, device -> {
+            IotDeviceRespVO respVO = BeanUtils.toBean(device, IotDeviceRespVO.class);
+            MapUtils.findAndThen(productMap, device.getProductId(),
+                    product -> respVO.setProductName(product.getName()));
+            return respVO;
+        }));
+    }
+
+    // TODO @AI：希望改成“未绑定的”。需要剔除已经绑定，包括自己的；
+    // TODO @AI：不需要传递 gatewayId；
+    // TODO @AI：需要分页；
+    @GetMapping("/bindable-sub-device-list")
+    @Operation(summary = "获取可绑定到网关的子设备列表")
+    @Parameter(name = "gatewayId", description = "网关设备编号（可选）", example = "1")
+    @PreAuthorize("@ss.hasPermission('iot:device:query')")
+    public CommonResult<List<IotDeviceRespVO>> getBindableSubDeviceList(
+            @RequestParam(value = "gatewayId", required = false) Long gatewayId) {
+        List<IotDeviceDO> list = deviceService.getBindableSubDeviceList(gatewayId);
+        if (CollUtil.isEmpty(list)) {
+            return success(Collections.emptyList());
+        }
+
+        // 补充产品名称
+        Map<Long, IotProductDO> productMap = convertMap(productService.getProductList(), IotProductDO::getId);
+        return success(convertList(list, device -> {
+            // TODO @AI：可以 beanutils 转换么？
+            IotDeviceRespVO respVO = new IotDeviceRespVO()
+                    .setId(device.getId())
+                    .setDeviceName(device.getDeviceName())
+                    .setNickname(device.getNickname())
+                    .setProductId(device.getProductId())
+                    .setState(device.getState())
+                    .setGatewayId(device.getGatewayId());
+            MapUtils.findAndThen(productMap, device.getProductId(),
+                    product -> respVO.setProductName(product.getName()));
+            return respVO;
+        }));
+    }
 
     @PutMapping("/update-group")
     @Operation(summary = "更新设备分组")
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceBindGatewayReqVO.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceBindGatewayReqVO.java
new file mode 100644
index 0000000000..be122d8730
--- /dev/null
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceBindGatewayReqVO.java
@@ -0,0 +1,22 @@
+package cn.iocoder.yudao.module.iot.controller.admin.device.vo.device;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+import java.util.Set;
+
+@Schema(description = "管理后台 - IoT 设备绑定网关 Request VO")
+@Data
+public class IotDeviceBindGatewayReqVO {
+
+    @Schema(description = "子设备编号列表", requiredMode = Schema.RequiredMode.REQUIRED, example = "1,2,3")
+    @NotEmpty(message = "子设备编号列表不能为空")
+    private Set<Long> ids;
+
+    @Schema(description = "网关设备编号", requiredMode = Schema.RequiredMode.REQUIRED, example = "10")
+    @NotNull(message = "网关设备编号不能为空")
+    private Long gatewayId;
+
+}
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceUnbindGatewayReqVO.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceUnbindGatewayReqVO.java
new file mode 100644
index 0000000000..64215f3f6b
--- /dev/null
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/controller/admin/device/vo/device/IotDeviceUnbindGatewayReqVO.java
@@ -0,0 +1,17 @@
+package cn.iocoder.yudao.module.iot.controller.admin.device.vo.device;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotEmpty;
+import lombok.Data;
+
+import java.util.Set;
+
+@Schema(description = "管理后台 - IoT 设备解绑网关 Request VO")
+@Data
+public class IotDeviceUnbindGatewayReqVO {
+
+    @Schema(description = "子设备编号列表", requiredMode = Schema.RequiredMode.REQUIRED, example = "1,2,3")
+    @NotEmpty(message = "子设备编号列表不能为空")
+    private Set<Long> ids;
+
+}
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/dal/mysql/device/IotDeviceMapper.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/dal/mysql/device/IotDeviceMapper.java
index bc76afe1f0..da1f5dd9eb 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/dal/mysql/device/IotDeviceMapper.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/dal/mysql/device/IotDeviceMapper.java
@@ -129,4 +129,33 @@ public interface IotDeviceMapper extends BaseMapperX<IotDeviceDO> {
                 .isNotNull(IotDeviceDO::getLongitude));
     }
 
+    // ========== 网关-子设备绑定相关 ==========
+
+    /**
+     * 根据网关编号查询子设备列表
+     *
+     * @param gatewayId 网关设备编号
+     * @return 子设备列表
+     */
+    default List<IotDeviceDO> selectListByGatewayId(Long gatewayId) {
+        return selectList(IotDeviceDO::getGatewayId, gatewayId);
+    }
+
+    /**
+     * 查询可绑定到网关的子设备列表
+     * <p>
+     * 条件：设备类型为 GATEWAY_SUB 且未绑定任何网关，或已绑定到指定网关
+     *
+     * @param gatewayId 网关设备编号（可选，用于包含已绑定到该网关的设备）
+     * @return 子设备列表
+     */
+    default List<IotDeviceDO> selectBindableSubDeviceList(@Nullable Long gatewayId) {
+        return selectList(new LambdaQueryWrapperX<IotDeviceDO>()
+                .eq(IotDeviceDO::getDeviceType, cn.iocoder.yudao.module.iot.enums.product.IotProductDeviceTypeEnum.GATEWAY_SUB.getType())
+                .and(wrapper -> wrapper
+                        .isNull(IotDeviceDO::getGatewayId)));
+//                        .or()
+//                        .eqIfPresent(IotDeviceDO::getGatewayId, gatewayId)))
+    }
+
 }
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/enums/ErrorCodeConstants.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/enums/ErrorCodeConstants.java
index 025d61390e..f94ce9af0d 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/enums/ErrorCodeConstants.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/enums/ErrorCodeConstants.java
@@ -33,6 +33,12 @@ public interface ErrorCodeConstants {
     ErrorCode DEVICE_IMPORT_LIST_IS_EMPTY = new ErrorCode(1_050_003_006, "导入设备数据不能为空！");
     ErrorCode DEVICE_DOWNSTREAM_FAILED_SERVER_ID_NULL = new ErrorCode(1_050_003_007, "下行设备消息失败，原因：设备未连接网关");
     ErrorCode DEVICE_SERIAL_NUMBER_EXISTS = new ErrorCode(1_050_003_008, "设备序列号已存在，序列号必须全局唯一");
+    // TODO @AI：1_050_003_009 需要提示具体的哪个设备。产品/设备，标识下
+    ErrorCode DEVICE_NOT_GATEWAY_SUB = new ErrorCode(1_050_003_009, "设备不是网关子设备类型，无法绑定到网关");
+    // TODO @AI：1_050_003_009 需要提示具体的哪个设备。产品/设备，标识下
+    ErrorCode DEVICE_GATEWAY_BINDTO_EXISTS = new ErrorCode(1_050_003_010, "设备已绑定到其他网关，请先解绑");
+    // TODO @AI：是不是可以删除，DEVICE_GATEWAY_BINDTO_NOT_EXISTS
+    ErrorCode DEVICE_GATEWAY_BINDTO_NOT_EXISTS = new ErrorCode(1_050_003_011, "设备未绑定到任何网关");
 
     // ========== 产品分类 1-050-004-000 ==========
     ErrorCode PRODUCT_CATEGORY_NOT_EXISTS = new ErrorCode(1_050_004_000, "产品分类不存在");
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceService.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceService.java
index 3664e96e16..84bdf8e09e 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceService.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceService.java
@@ -73,6 +73,7 @@ public interface IotDeviceService {
      */
     void updateDeviceGroup(@Valid IotDeviceUpdateGroupReqVO updateReqVO);
 
+    // TODO @AI：网关设备被删除时，需要查看是否有子设备绑定。如果有，则不允许删除。
     /**
      * 删除单个设备
      *
@@ -288,4 +289,48 @@ public interface IotDeviceService {
      */
     List<IotDeviceDO> getDeviceListByHasLocation();
 
+    // ========== 网关-子设备绑定相关 ==========
+
+    /**
+     * 绑定子设备到网关
+     *
+     * @param ids       子设备编号列表
+     * @param gatewayId 网关设备编号
+     */
+    void bindDeviceGateway(Collection<Long> ids, Long gatewayId);
+
+    /**
+     * 解绑子设备与网关
+     *
+     * @param ids 子设备编号列表
+     */
+    void unbindDeviceGateway(Collection<Long> ids);
+
+    /**
+     * 获取可绑定到网关的子设备列表
+     * <p>
+     * 条件：设备类型为 GATEWAY_SUB 且未绑定任何网关
+     *
+     * @param gatewayId 网关设备编号（可选，用于包含已绑定到该网关的设备）
+     * @return 子设备列表
+     */
+    List<IotDeviceDO> getBindableSubDeviceList(@Nullable Long gatewayId);
+
+    /**
+     * 根据网关编号获取子设备列表
+     *
+     * @param gatewayId 网关设备编号
+     * @return 子设备列表
+     */
+    List<IotDeviceDO> getDeviceListByGatewayId(Long gatewayId);
+
+    // TODO @AI：暂时用不到，可以删除。
+    /**
+     * 根据网关编号获取子设备数量
+     *
+     * @param gatewayId 网关设备编号
+     * @return 子设备数量
+     */
+    Long getDeviceCountByGatewayId(Long gatewayId);
+
 }
diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceServiceImpl.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceServiceImpl.java
index 532b254a1b..f5b0784806 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceServiceImpl.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/IotDeviceServiceImpl.java
@@ -514,6 +514,85 @@ public class IotDeviceServiceImpl implements IotDeviceService {
         return deviceMapper.selectListByHasLocation();
     }
 
+    // ========== 网关-子设备绑定相关 ==========
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void bindDeviceGateway(Collection<Long> ids, Long gatewayId) {
+        if (CollUtil.isEmpty(ids)) {
+            return;
+        }
+        // TODO @AI：校验应该是 1.1、1.2 统一风格；
+        // 1. 校验网关设备存在且类型正确
+        validateGatewayDeviceExists(gatewayId);
+
+        // 2. 校验并绑定每个子设备
+        List<IotDeviceDO> devices = deviceMapper.selectByIds(ids);
+        if (devices.size() != ids.size()) {
+            throw exception(DEVICE_NOT_EXISTS);
+        }
+
+        List<IotDeviceDO> updateList = new ArrayList<>();
+        for (IotDeviceDO device : devices) {
+            // 2.1 校验是否为子设备类型
+            if (!IotProductDeviceTypeEnum.isGatewaySub(device.getDeviceType())) {
+                throw exception(DEVICE_NOT_GATEWAY_SUB);
+            }
+            // 2.2 校验是否已绑定其他网关
+            if (device.getGatewayId() != null && !device.getGatewayId().equals(gatewayId)) {
+                throw exception(DEVICE_GATEWAY_BINDTO_EXISTS);
+            }
+            updateList.add(new IotDeviceDO().setId(device.getId()).setGatewayId(gatewayId));
+        }
+
+        // 3. 批量更新数据库
+        // TODO @AI：List<IotDeviceDO> updateList 直接 convertList，不用上面 for 里面搞；校验是校验，插入是插入；
+        deviceMapper.updateBatch(updateList);
+
+        // 4. 清空对应缓存
+        deleteDeviceCache(devices);
+    }
+
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void unbindDeviceGateway(Collection<Long> ids) {
+        if (CollUtil.isEmpty(ids)) {
+            return;
+        }
+        // 1. 校验设备存在
+        List<IotDeviceDO> devices = deviceMapper.selectByIds(ids);
+        if (devices.size() != ids.size()) {
+            throw exception(DEVICE_NOT_EXISTS);
+        }
+
+        // 2. 批量更新数据库（将 gatewayId 设置为 null）
+        List<IotDeviceDO> updateList = devices.stream()
+                .filter(device -> device.getGatewayId() != null)
+                .map(device -> new IotDeviceDO().setId(device.getId()).setGatewayId(null))
+                .toList();
+        if (CollUtil.isNotEmpty(updateList)) {
+            deviceMapper.updateBatch(updateList);
+        }
+
+        // 3. 清空对应缓存
+        deleteDeviceCache(devices);
+    }
+
+    @Override
+    public List<IotDeviceDO> getBindableSubDeviceList(@Nullable Long gatewayId) {
+        return deviceMapper.selectBindableSubDeviceList(gatewayId);
+    }
+
+    @Override
+    public List<IotDeviceDO> getDeviceListByGatewayId(Long gatewayId) {
+        return deviceMapper.selectListByGatewayId(gatewayId);
+    }
+
+    @Override
+    public Long getDeviceCountByGatewayId(Long gatewayId) {
+        return deviceMapper.selectCountByGatewayId(gatewayId);
+    }
+
     private IotDeviceServiceImpl getSelf() {
         return SpringUtil.getBean(getClass());
     }