diff --git a/apps/web-antd/src/api/iot/device/device/index.ts b/apps/web-antd/src/api/iot/device/device/index.ts
index ca2a17ada..06038e532 100644
--- a/apps/web-antd/src/api/iot/device/device/index.ts
+++ b/apps/web-antd/src/api/iot/device/device/index.ts
@@ -25,6 +25,17 @@ export namespace IotDeviceApi {
     latitude?: number; // 设备位置的纬度
     longitude?: number; // 设备位置的经度
     createTime?: Date; // 创建时间
+    /** 所属子系统编号（null = 未归属，⚠️ A2 存量设备可能为 NULL） */
+    subsystemId?: null | number;
+    /** 所属子系统名称（后端 join，便于列表直接展示） */
+    subsystemName?: string;
+  }
+
+  /** 绑定子系统请求体（单设备） */
+  export interface BindSubsystemReqVO {
+    deviceId: number;
+    /** null 表示解绑（移除归属） */
+    subsystemId: null | number;
   }
 
   /** 设备更新分组 Request VO */
@@ -232,3 +243,12 @@ export function getUnboundSubDevicePage(params: PageParam) {
     { params },
   );
 }
+
+/**
+ * 单设备绑定/解绑子系统
+ * ⚠️ [F11] B11 需要实现：PUT /iot/device/bindSubsystem
+ * subsystemId=null 表示解绑（移除归属）
+ */
+export function bindDeviceSubsystem(data: IotDeviceApi.BindSubsystemReqVO) {
+  return requestClient.put<boolean>('/iot/device/bindSubsystem', data);
+}
diff --git a/apps/web-antd/src/locales/langs/en-US/page.json b/apps/web-antd/src/locales/langs/en-US/page.json
index 203a45fb3..e0079da86 100644
--- a/apps/web-antd/src/locales/langs/en-US/page.json
+++ b/apps/web-antd/src/locales/langs/en-US/page.json
@@ -41,6 +41,24 @@
     }
   },
   "iot": {
+    "device": {
+      "filter": {
+        "subsystem": {
+          "placeholder": "All Subsystems",
+          "unassigned": "Unassigned",
+          "bind": "Bind Subsystem",
+          "bindTitle": "Bind Subsystem",
+          "batchBind": "Batch Bind Subsystem",
+          "batchBindTitle": "Batch Bind Subsystem",
+          "batchBindSuccess": "{0} device(s) bound successfully",
+          "bindSuccess": "Bound successfully",
+          "selectRequired": "Please select a subsystem first",
+          "selectDeviceTip": "Please select devices first",
+          "binding": "Binding...",
+          "batchBindHint": "{0} device(s) selected, max 100 per batch"
+        }
+      }
+    },
     "subsystem": {
       "title": "Subsystem",
       "listTitle": "Subsystem List",
diff --git a/apps/web-antd/src/locales/langs/zh-CN/page.json b/apps/web-antd/src/locales/langs/zh-CN/page.json
index b3774e0d4..042c0446e 100644
--- a/apps/web-antd/src/locales/langs/zh-CN/page.json
+++ b/apps/web-antd/src/locales/langs/zh-CN/page.json
@@ -41,6 +41,24 @@
     }
   },
   "iot": {
+    "device": {
+      "filter": {
+        "subsystem": {
+          "placeholder": "全部子系统",
+          "unassigned": "未归属",
+          "bind": "绑定子系统",
+          "bindTitle": "绑定子系统",
+          "batchBind": "批量绑定子系统",
+          "batchBindTitle": "批量绑定子系统",
+          "batchBindSuccess": "已成功绑定 {0} 台设备",
+          "bindSuccess": "绑定成功",
+          "selectRequired": "请先选择子系统",
+          "selectDeviceTip": "请先选择要绑定的设备",
+          "binding": "正在绑定...",
+          "batchBindHint": "已选 {0} 台设备，每批最多 100 台"
+        }
+      }
+    },
     "subsystem": {
       "title": "子系统",
       "listTitle": "子系统列表",
diff --git a/apps/web-antd/src/views/iot/device/device/__tests__/device-subsystem-filter.spec.ts b/apps/web-antd/src/views/iot/device/device/__tests__/device-subsystem-filter.spec.ts
new file mode 100644
index 000000000..aa262df6f
--- /dev/null
+++ b/apps/web-antd/src/views/iot/device/device/__tests__/device-subsystem-filter.spec.ts
@@ -0,0 +1,154 @@
+import { describe, expect, it } from 'vitest';
+
+/**
+ * F11 — 设备查询页 subsystemId 筛选 + "未归属"标签
+ *
+ * 测试覆盖：
+ * 1. 前端哨兵值 -1 转换为 { unassigned: true } 后端参数
+ * 2. 正常子系统 ID 透传为 { subsystemId: X }
+ * 3. undefined（全部）不传任何子系统相关参数
+ * 4. 批量绑定分批逻辑（每批 ≤ 100 台，⚠️ B11 限制）
+ * 5. 未归属标签渲染条件（subsystemId == null/undefined → 红标签）
+ */
+
+// ─── 1. 子系统筛选参数转换 ─────────────────────────────────────────────────────
+
+const UNASSIGNED_SENTINEL = -1;
+
+interface SubsystemQueryParam {
+  subsystemId?: number;
+  unassigned?: boolean;
+}
+
+/**
+ * 将前端筛选 Select 的值转换为后端查询参数
+ * -1 → { unassigned: true }
+ * 正常 ID → { subsystemId: id }
+ * undefined → {}（全部）
+ */
+function buildSubsystemQueryParam(
+  filterValue: number | undefined,
+): SubsystemQueryParam {
+  if (filterValue === UNASSIGNED_SENTINEL) {
+    return { unassigned: true };
+  }
+  if (filterValue !== undefined) {
+    return { subsystemId: filterValue };
+  }
+  return {};
+}
+
+describe('buildSubsystemQueryParam — 筛选参数转换', () => {
+  it('哨兵值 -1 → unassigned=true（未归属筛选）', () => {
+    const result = buildSubsystemQueryParam(-1);
+    expect(result).toEqual({ unassigned: true });
+    expect(result.subsystemId).toBeUndefined();
+  });
+
+  it('正常子系统 ID → subsystemId 透传', () => {
+    const result = buildSubsystemQueryParam(42);
+    expect(result).toEqual({ subsystemId: 42 });
+    expect(result.unassigned).toBeUndefined();
+  });
+
+  it('undefined（全部）→ 空对象，不传任何子系统参数', () => {
+    const result = buildSubsystemQueryParam(undefined);
+    expect(result).toEqual({});
+    expect(result.subsystemId).toBeUndefined();
+    expect(result.unassigned).toBeUndefined();
+  });
+
+  it('subsystemId=0 不应被视为未归属（防御性测试）', () => {
+    // 0 是合法的数字 ID，不是哨兵值
+    const result = buildSubsystemQueryParam(0);
+    expect(result).toEqual({ subsystemId: 0 });
+    expect(result.unassigned).toBeUndefined();
+  });
+});
+
+// ─── 2. 未归属标签渲染条件（⚠️ A2：存量 NULL 醒目展示）────────────────────────
+
+/**
+ * 判断设备是否未归属（subsystemId 为 null 或 undefined）
+ * 对应模板中 v-if="row.subsystemId == null" 的判断逻辑
+ * 注意：模板中使用宽松 == null（同时处理 null/undefined），
+ *       此处用严格判断等价替代。
+ */
+function isUnassigned(subsystemId: null | number | undefined): boolean {
+  return subsystemId === null || subsystemId === undefined;
+}
+
+describe('isUnassigned — 未归属标签渲染条件（⚠️ A2）', () => {
+  it('subsystemId=null → 未归属（存量 NULL 设备）', () => {
+    expect(isUnassigned(null)).toBe(true);
+  });
+
+  it('subsystemId=undefined → 未归属（字段缺失时）', () => {
+    expect(isUnassigned(undefined)).toBe(true);
+  });
+
+  it('subsystemId=1 → 已归属，不展示红标签', () => {
+    expect(isUnassigned(1)).toBe(false);
+  });
+
+  it('subsystemId=0 → 已归属（0 是合法 ID）', () => {
+    expect(isUnassigned(0)).toBe(false);
+  });
+});
+
+// ─── 3. 批量绑定分批逻辑（⚠️ B11 限制 100 台/批）──────────────────────────────
+
+const BATCH_SIZE = 100;
+
+function splitIntoBatches<T>(items: T[], batchSize: number): T[][] {
+  const batches: T[][] = [];
+  for (let i = 0; i < items.length; i += batchSize) {
+    batches.push(items.slice(i, i + batchSize));
+  }
+  return batches;
+}
+
+describe('splitIntoBatches — 批量绑定分批（⚠️ B11 每批 ≤ 100 台）', () => {
+  it('50 台 → 1 批', () => {
+    const ids = Array.from({ length: 50 }, (_, i) => i + 1);
+    const batches = splitIntoBatches(ids, BATCH_SIZE);
+    expect(batches).toHaveLength(1);
+    expect(batches[0]).toHaveLength(50);
+  });
+
+  it('恰好 100 台 → 1 批', () => {
+    const ids = Array.from({ length: 100 }, (_, i) => i + 1);
+    const batches = splitIntoBatches(ids, BATCH_SIZE);
+    expect(batches).toHaveLength(1);
+    expect(batches[0]).toHaveLength(100);
+  });
+
+  it('101 台 → 2 批（100 + 1）', () => {
+    const ids = Array.from({ length: 101 }, (_, i) => i + 1);
+    const batches = splitIntoBatches(ids, BATCH_SIZE);
+    expect(batches).toHaveLength(2);
+    expect(batches[0]).toHaveLength(100);
+    expect(batches[1]).toHaveLength(1);
+  });
+
+  it('250 台 → 3 批（100 + 100 + 50）', () => {
+    const ids = Array.from({ length: 250 }, (_, i) => i + 1);
+    const batches = splitIntoBatches(ids, BATCH_SIZE);
+    expect(batches).toHaveLength(3);
+    expect(batches[0]).toHaveLength(100);
+    expect(batches[1]).toHaveLength(100);
+    expect(batches[2]).toHaveLength(50);
+  });
+
+  it('空数组 → 0 批', () => {
+    expect(splitIntoBatches([], BATCH_SIZE)).toHaveLength(0);
+  });
+
+  it('分批后所有 ID 不丢失', () => {
+    const ids = Array.from({ length: 220 }, (_, i) => i + 1);
+    const batches = splitIntoBatches(ids, BATCH_SIZE);
+    const flattened = batches.flat();
+    expect(flattened).toHaveLength(220);
+    expect(flattened).toEqual(ids);
+  });
+});
diff --git a/apps/web-antd/src/views/iot/device/device/data.ts b/apps/web-antd/src/views/iot/device/device/data.ts
index c53c0e207..8878d5dc3 100644
--- a/apps/web-antd/src/views/iot/device/device/data.ts
+++ b/apps/web-antd/src/views/iot/device/device/data.ts
@@ -310,6 +310,12 @@ export function useGridColumns(): VxeTableGridOptions['columns'] {
       minWidth: 150,
       slots: { default: 'groups' },
     },
+    {
+      field: 'subsystemId',
+      title: '所属子系统',
+      minWidth: 140,
+      slots: { default: 'subsystem' },
+    },
     {
       field: 'state',
       title: '设备状态',
diff --git a/apps/web-antd/src/views/iot/device/device/index.vue b/apps/web-antd/src/views/iot/device/device/index.vue
index 9b1d53e58..f7e30b556 100644
--- a/apps/web-antd/src/views/iot/device/device/index.vue
+++ b/apps/web-antd/src/views/iot/device/device/index.vue
@@ -1,9 +1,11 @@
 <script setup lang="ts">
 import type { PageParam } from '@vben/request';
 
+import type { VxeTableGridOptions } from '#/adapter/vxe-table';
 import type { IotDeviceApi } from '#/api/iot/device/device';
 import type { IotDeviceGroupApi } from '#/api/iot/device/group';
 import type { IotProductApi } from '#/api/iot/product/product';
+import type { IotSubsystemApi } from '#/api/iot/subsystem';
 
 import { nextTick, onMounted, ref } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
@@ -19,6 +21,7 @@ import {
   Card,
   Input,
   message,
+  Modal,
   Select,
   Space,
   Tag,
@@ -26,6 +29,7 @@ import {
 
 import { ACTION_ICON, TableAction, useVbenVxeGrid } from '#/adapter/vxe-table';
 import {
+  bindDeviceSubsystem,
   deleteDevice,
   deleteDeviceList,
   exportDeviceExcel,
@@ -33,6 +37,10 @@ import {
 } from '#/api/iot/device/device';
 import { getSimpleDeviceGroupList } from '#/api/iot/device/group';
 import { getSimpleProductList } from '#/api/iot/product/product';
+import {
+  batchBindSubsystem,
+  getSubsystemSimpleList,
+} from '#/api/iot/subsystem';
 import { $t } from '#/locales';
 
 import { useGridColumns } from './data';
@@ -48,9 +56,21 @@ const route = useRoute();
 const router = useRouter();
 const products = ref<IotProductApi.Product[]>([]);
 const deviceGroups = ref<IotDeviceGroupApi.DeviceGroup[]>([]);
+const subsystems = ref<IotSubsystemApi.SubsystemSimple[]>([]);
 const viewMode = ref<'card' | 'list'>('card');
 const cardViewRef = ref();
 const checkedIds = ref<number[]>([]);
+// 单设备绑定弹窗状态
+const bindModalVisible = ref(false);
+const bindingRow = ref<IotDeviceApi.Device | null>(null);
+const singleBindSubsystemId = ref<number | undefined>(undefined);
+const bindLoading = ref(false);
+
+// 批量绑定弹窗状态
+const batchBindModalVisible = ref(false);
+// 批量绑定时选择的目标子系统
+const batchBindSubsystemId = ref<number | undefined>(undefined);
+const batchBindLoading = ref(false);
 
 /** 判断是否为列表视图 */
 const isListView = () => viewMode.value === 'list';
@@ -70,17 +90,41 @@ const [DeviceImportFormModal, deviceImportFormModalApi] = useVbenModal({
   destroyOnClose: true,
 });
 
-const queryParams = ref<Partial<PageParam>>({
+const queryParams = ref<
+  Partial<PageParam> & { subsystemId?: number; unassigned?: boolean }
+>({
   deviceName: '',
   nickname: '',
   productId: undefined,
   deviceType: undefined,
   status: undefined,
   groupId: undefined,
+  subsystemId: undefined,
+  unassigned: undefined,
 }); // 搜索参数
 
+/**
+ * 子系统筛选选项值
+ * -1 是前端约定的"未归属"哨兵值，不传给后端；
+ * 转换时改为 unassigned=true
+ */
+const subsystemFilterValue = ref<number | undefined>(undefined);
+
+/** 将前端筛选值（含哨兵 -1）转换为后端参数 */
+function applySubsystemFilter() {
+  if (subsystemFilterValue.value === -1) {
+    // "未归属"：传 unassigned=true，不传 subsystemId
+    queryParams.value.unassigned = true;
+    queryParams.value.subsystemId = undefined;
+  } else {
+    queryParams.value.unassigned = undefined;
+    queryParams.value.subsystemId = subsystemFilterValue.value;
+  }
+}
+
 /** 搜索 */
 function handleSearch() {
+  applySubsystemFilter();
   if (viewMode.value === 'list') {
     gridApi.formApi.setValues(queryParams.value);
   }
@@ -95,6 +139,9 @@ function handleReset() {
   queryParams.value.deviceType = undefined;
   queryParams.value.status = undefined;
   queryParams.value.groupId = undefined;
+  queryParams.value.subsystemId = undefined;
+  queryParams.value.unassigned = undefined;
+  subsystemFilterValue.value = undefined;
   handleSearch();
 }
 
@@ -260,12 +307,89 @@ gridApi.query = async (params?: Record<string, any>) => {
   }
 };
 
+/**
+ * 打开单设备绑定子系统弹窗
+ * ⚠️ [F11/A2] 权限：iot:device:update
+ */
+function handleBindSubsystem(row: IotDeviceApi.Device) {
+  bindingRow.value = row;
+  singleBindSubsystemId.value = undefined;
+  bindModalVisible.value = true;
+}
+
+/** 确认单设备绑定 */
+async function confirmBindSubsystem() {
+  if (!singleBindSubsystemId.value) {
+    message.warning($t('iot.device.filter.subsystem.selectRequired'));
+    return;
+  }
+  bindLoading.value = true;
+  try {
+    await bindDeviceSubsystem({
+      deviceId: bindingRow.value!.id!,
+      subsystemId: singleBindSubsystemId.value,
+    });
+    message.success($t('iot.device.filter.subsystem.bindSuccess'));
+    bindModalVisible.value = false;
+    handleRefresh();
+  } finally {
+    bindLoading.value = false;
+  }
+}
+
+/**
+ * 打开批量绑定子系统弹窗
+ * 每批最多 100 台（⚠️ F11/Known Pitfall B11 限制）
+ */
+function handleBatchBindSubsystem() {
+  if (checkedIds.value.length === 0) {
+    message.warning($t('iot.device.filter.subsystem.selectDeviceTip'));
+    return;
+  }
+  batchBindSubsystemId.value = undefined;
+  batchBindModalVisible.value = true;
+}
+
+/** 确认批量绑定 */
+async function confirmBatchBindSubsystem() {
+  if (!batchBindSubsystemId.value) {
+    message.warning($t('iot.device.filter.subsystem.selectRequired'));
+    return;
+  }
+  const BATCH_SIZE = 100;
+  const ids = checkedIds.value;
+  batchBindLoading.value = true;
+  try {
+    // 分批请求，每批最多 100 台
+    for (let i = 0; i < ids.length; i += BATCH_SIZE) {
+      await batchBindSubsystem({
+        deviceIds: ids.slice(i, i + BATCH_SIZE),
+        subsystemId: batchBindSubsystemId.value,
+      });
+    }
+    message.success(
+      $t('iot.device.filter.subsystem.batchBindSuccess', [ids.length]),
+    );
+    checkedIds.value = [];
+    batchBindModalVisible.value = false;
+    handleRefresh();
+  } finally {
+    batchBindLoading.value = false;
+  }
+}
+
 /** 初始化 */
 onMounted(async () => {
   // 获取产品列表
   products.value = await getSimpleProductList();
   // 获取分组列表
   deviceGroups.value = await getSimpleDeviceGroupList();
+  // 获取子系统精简列表（⚠️ F11 一次性加载）
+  try {
+    subsystems.value = await getSubsystemSimpleList();
+  } catch {
+    // 子系统接口可能未就绪（B10 未完成时），忽略错误，不影响主功能
+  }
 
   // 处理 productId 参数
   const { productId } = route.query;
@@ -283,6 +407,47 @@ onMounted(async () => {
     <DeviceGroupFormModal @success="handleRefresh" />
     <DeviceImportFormModal @success="handleRefresh" />
 
+    <!-- 单设备绑定子系统弹窗（F11） -->
+    <Modal
+      v-model:open="bindModalVisible"
+      :title="$t('iot.device.filter.subsystem.bindTitle')"
+      :confirm-loading="bindLoading"
+      @ok="confirmBindSubsystem"
+    >
+      <div class="py-2">
+        <Select
+          v-model:value="singleBindSubsystemId"
+          :placeholder="$t('iot.device.filter.subsystem.placeholder')"
+          allow-clear
+          style="width: 100%"
+          :options="subsystems.map((s) => ({ label: s.name, value: s.id }))"
+        />
+      </div>
+    </Modal>
+
+    <!-- 批量绑定子系统弹窗（F11，每批 ≤ 100 台） -->
+    <Modal
+      v-model:open="batchBindModalVisible"
+      :title="$t('iot.device.filter.subsystem.batchBindTitle')"
+      :confirm-loading="batchBindLoading"
+      @ok="confirmBatchBindSubsystem"
+    >
+      <div class="py-2">
+        <p class="mb-2 text-gray-500">
+          {{
+            $t('iot.device.filter.subsystem.batchBindHint', [checkedIds.length])
+          }}
+        </p>
+        <Select
+          v-model:value="batchBindSubsystemId"
+          :placeholder="$t('iot.device.filter.subsystem.placeholder')"
+          allow-clear
+          style="width: 100%"
+          :options="subsystems.map((s) => ({ label: s.name, value: s.id }))"
+        />
+      </div>
+    </Modal>
+
     <!-- 统一搜索工具栏 -->
     <Card :body-style="{ padding: '16px' }" class="mb-4">
       <!-- 搜索表单 -->
@@ -360,6 +525,22 @@ onMounted(async () => {
             {{ group.name }}
           </Select.Option>
         </Select>
+        <!-- 子系统筛选（F11）：-1 = 未归属哨兵值，展示为红色标签 -->
+        <Select
+          v-model:value="subsystemFilterValue"
+          :placeholder="$t('iot.device.filter.subsystem.placeholder')"
+          allow-clear
+          style="width: 200px"
+        >
+          <Select.Option :value="-1">
+            <Tag color="red" class="!m-0">
+              {{ $t('iot.device.filter.subsystem.unassigned') }}
+            </Tag>
+          </Select.Option>
+          <Select.Option v-for="s in subsystems" :key="s.id" :value="s.id">
+            {{ s.name }}
+          </Select.Option>
+        </Select>
         <Button type="primary" @click="handleSearch">
           <IconifyIcon icon="ant-design:search-outlined" class="mr-1" />
           {{ $t('common.search') }}
@@ -404,6 +585,15 @@ onMounted(async () => {
               disabled: isEmpty(checkedIds),
               onClick: handleAddToGroup,
             },
+            {
+              label: $t('iot.device.filter.subsystem.batchBind'),
+              type: 'primary',
+              icon: 'ant-design:apartment-outlined',
+              auth: ['iot:device:update'],
+              ifShow: isListView,
+              disabled: isEmpty(checkedIds),
+              onClick: handleBatchBindSubsystem,
+            },
             {
               label: $t('ui.actionTitle.deleteBatch'),
               type: 'primary',
@@ -457,6 +647,19 @@ onMounted(async () => {
         </template>
         <span v-else>-</span>
       </template>
+      <!-- 子系统列（F11）：subsystemId=null/undefined → 红色"未归属"标签（⚠️ A2） -->
+      <template #subsystem="{ row }">
+        <Tag v-if="row.subsystemId == null" color="red" class="!m-0">
+          {{ $t('iot.device.filter.subsystem.unassigned') }}
+        </Tag>
+        <span v-else>
+          {{
+            subsystems.find((s) => s.id === row.subsystemId)?.name ??
+            row.subsystemName ??
+            String(row.subsystemId)
+          }}
+        </span>
+      </template>
       <template #actions="{ row }">
         <TableAction
           :actions="[
@@ -476,6 +679,13 @@ onMounted(async () => {
               icon: ACTION_ICON.EDIT,
               onClick: handleEdit.bind(null, row),
             },
+            {
+              label: $t('iot.device.filter.subsystem.bind'),
+              type: 'link',
+              icon: 'ant-design:apartment-outlined',
+              auth: ['iot:device:update'],
+              onClick: handleBindSubsystem.bind(null, row),
+            },
             {
               label: $t('common.delete'),
               type: 'link',
@@ -497,6 +707,7 @@ onMounted(async () => {
       ref="cardViewRef"
       :products="products"
       :device-groups="deviceGroups"
+      :subsystems="subsystems"
       :search-params="{
         deviceName: queryParams.deviceName || '',
         nickname: queryParams.nickname || '',
@@ -504,6 +715,8 @@ onMounted(async () => {
         deviceType: queryParams.deviceType,
         status: queryParams.status,
         groupId: queryParams.groupId,
+        subsystemId: queryParams.subsystemId,
+        unassigned: queryParams.unassigned,
       }"
       @create="handleCreate"
       @edit="handleEdit"
diff --git a/apps/web-antd/src/views/iot/device/device/modules/card-view.vue b/apps/web-antd/src/views/iot/device/device/modules/card-view.vue
index dca9b5968..891d182ee 100644
--- a/apps/web-antd/src/views/iot/device/device/modules/card-view.vue
+++ b/apps/web-antd/src/views/iot/device/device/modules/card-view.vue
@@ -2,6 +2,7 @@
 import type { PageParam } from '@vben/request';
 
 import type { IotDeviceApi } from '#/api/iot/device/device';
+import type { IotSubsystemApi } from '#/api/iot/subsystem';
 
 import { onMounted, ref } from 'vue';
 
@@ -17,6 +18,7 @@ import {
   Pagination,
   Popconfirm,
   Row,
+  Tag,
   Tooltip,
 } from 'ant-design-vue';
 
@@ -26,6 +28,7 @@ import { DictTag } from '#/components/dict-tag';
 interface Props {
   products: any[];
   deviceGroups: any[];
+  subsystems?: IotSubsystemApi.SubsystemSimple[];
   searchParams?: {
     deviceName: string;
     deviceType?: number;
@@ -33,6 +36,10 @@ interface Props {
     nickname: string;
     productId?: number;
     status?: number;
+    /** 子系统 ID 筛选（undefined = 全部） */
+    subsystemId?: number;
+    /** true = 仅展示未归属设备（⚠️ A2） */
+    unassigned?: boolean;
   };
 }
 
@@ -165,6 +172,25 @@ onMounted(() => {
                     </span>
                   </Tooltip>
                 </div>
+                <!-- 子系统（F11）：subsystemId=null → 红色"未归属"标签（⚠️ A2） -->
+                <div class="info-item">
+                  <span class="info-label">子系统</span>
+                  <Tag
+                    v-if="item.subsystemId == null"
+                    color="red"
+                    class="info-tag m-0"
+                  >
+                    未归属
+                  </Tag>
+                  <span v-else class="info-value">
+                    {{
+                      props.subsystems?.find((s) => s.id === item.subsystemId)
+                        ?.name ??
+                      item.subsystemName ??
+                      String(item.subsystemId)
+                    }}
+                  </span>
+                </div>
               </div>
               <!-- 设备图片 -->
               <div class="device-image">