diff --git a/Sense/ui/package.json b/Sense/ui/package.json
index 11f00ba..c23c231 100644
--- a/Sense/ui/package.json
+++ b/Sense/ui/package.json
@@ -11,7 +11,8 @@
     "serve": "vue-cli-service serve",
     "build": "vue-cli-service build",
     "lint": "eslint \"src/**/*.{js,vue}\"",
-    "test:navigation": "node --test tests/navigation.test.cjs"
+    "test:navigation": "node --test tests/navigation.test.cjs",
+    "test:device-payload": "node --test tests/devicePayload.test.mjs"
   },
   "dependencies": {
     "@element-plus/icons-vue": "2.3.2",
diff --git a/Sense/ui/src/views/sense/device/Devices.vue b/Sense/ui/src/views/sense/device/Devices.vue
index 35d1526..e101b59 100644
--- a/Sense/ui/src/views/sense/device/Devices.vue
+++ b/Sense/ui/src/views/sense/device/Devices.vue
@@ -52,6 +52,7 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import { Plus, Search } from '@element-plus/icons-vue'
 import { useStore } from 'vuex'
 import { createDevice, disableDevice, listDevices, updateCredential, updateDevice } from '../../../api/sense/device'
+import { createDevicePayload, updateDevicePayload } from './devicePayload.mjs'
 
 const store = useStore()
 const loading = ref(false), saving = ref(false), deviceDialog = ref(false), credentialDialog = ref(false)
@@ -69,7 +70,7 @@ function reset() { Object.assign(query, { keyword: '', page: 1, page_size: 20 })
 function openCreate() { editing.value = null; Object.assign(deviceForm, { name: '', location: '', modality: 'video', capabilities: ['video'] }); deviceDialog.value = true }
 function openEdit(row) { editing.value = row; Object.assign(deviceForm, { name: row.name, location: row.location, modality: row.modality, capabilities: row.capabilities }); deviceDialog.value = true }
 function openCredential(row) { credentialTarget.value = row; Object.assign(credentialForm, { onvif_username: '', onvif_password: '', rtsp_same_as_onvif: row.rtsp_credential_same_as_onvif !== false, rtsp_username: '', rtsp_password: '' }); credentialDialog.value = true }
-async function saveDevice() { const valid = await deviceFormRef.value?.validate().catch(() => false); if (!valid) return; saving.value = true; try { if (editing.value) await updateDevice(editing.value.id, { ...deviceForm, version: editing.value.version }); else await createDevice(deviceForm); ElMessage.success('设备已保存'); deviceDialog.value = false; await load() } catch (error) { ElMessage.error(error.message || '保存失败') } finally { saving.value = false } }
+async function saveDevice() { const valid = await deviceFormRef.value?.validate().catch(() => false); if (!valid) return; saving.value = true; try { if (editing.value) await updateDevice(editing.value.id, updateDevicePayload(deviceForm, editing.value.version)); else await createDevice(createDevicePayload(deviceForm)); ElMessage.success('设备已保存'); deviceDialog.value = false; await load() } catch (error) { ElMessage.error(error.message || '保存失败') } finally { saving.value = false } }
 async function saveCredential() { const valid = await credentialFormRef.value?.validate().catch(() => false); if (!valid) return; saving.value = true; try { await updateCredential(credentialTarget.value.id, credentialForm); Object.assign(credentialForm, { onvif_username: '', onvif_password: '', rtsp_same_as_onvif: true, rtsp_username: '', rtsp_password: '' }); ElMessage.success('ONVIF 与 RTSP 凭据已安全更新'); credentialDialog.value = false; await load() } catch (error) { ElMessage.error(error.message || '更新失败') } finally { saving.value = false } }
 async function disable(row) { await ElMessageBox.confirm(`停用“${row.name}”后将停止后续接入，设备记录和审计仍保留。`, '确认停用', { type: 'warning' }); await disableDevice(row.id, row.version); ElMessage.success('设备已停用'); await load() }
 onMounted(load)
diff --git a/Sense/ui/src/views/sense/device/devicePayload.mjs b/Sense/ui/src/views/sense/device/devicePayload.mjs
new file mode 100644
index 0000000..2579d8f
--- /dev/null
+++ b/Sense/ui/src/views/sense/device/devicePayload.mjs
@@ -0,0 +1,17 @@
+export function createDevicePayload(form) {
+  return {
+    name: form.name,
+    location: form.location,
+    modality: form.modality,
+    capabilities: [...form.capabilities]
+  }
+}
+
+export function updateDevicePayload(form, version) {
+  return {
+    name: form.name,
+    location: form.location,
+    capabilities: [...form.capabilities],
+    version
+  }
+}
diff --git a/Sense/ui/tests/devicePayload.test.mjs b/Sense/ui/tests/devicePayload.test.mjs
new file mode 100644
index 0000000..19f3af0
--- /dev/null
+++ b/Sense/ui/tests/devicePayload.test.mjs
@@ -0,0 +1,33 @@
+import assert from 'node:assert/strict'
+import test from 'node:test'
+
+import { createDevicePayload, updateDevicePayload } from '../src/views/sense/device/devicePayload.mjs'
+
+const form = {
+  name: '东门摄像机',
+  location: '教学楼一楼东门',
+  modality: 'video',
+  capabilities: ['video'],
+  id: 'read-only-id'
+}
+
+test('create payload keeps Chinese values and includes modality', () => {
+  assert.deepEqual(createDevicePayload(form), {
+    name: '东门摄像机',
+    location: '教学楼一楼东门',
+    modality: 'video',
+    capabilities: ['video']
+  })
+})
+
+test('update payload uses the PATCH allowlist and excludes modality', () => {
+  const payload = updateDevicePayload(form, 9)
+  assert.deepEqual(payload, {
+    name: '东门摄像机',
+    location: '教学楼一楼东门',
+    capabilities: ['video'],
+    version: 9
+  })
+  assert.equal('modality' in payload, false)
+  assert.equal('id' in payload, false)
+})