diff --git a/apps/daas/src/components.d.ts b/apps/daas/src/components.d.ts
index 1648bcd52..73f44d377 100644
--- a/apps/daas/src/components.d.ts
+++ b/apps/daas/src/components.d.ts
@@ -108,6 +108,7 @@ declare module 'vue' {
     'IMingcute:brushLine': typeof import('~icons/mingcute/brush-line')['default']
     'IMingcute:checkLine': typeof import('~icons/mingcute/check-line')['default']
     'IMingcute:closeLine': typeof import('~icons/mingcute/close-line')['default']
+    'IMingcute:copy2Line': typeof import('~icons/mingcute/copy2-line')['default']
     'IMingcute:download2Line': typeof import('~icons/mingcute/download2-line')['default']
     'IMingcute:externalLinkLine': typeof import('~icons/mingcute/external-link-line')['default']
     'IMingcute:loadingLine': typeof import('~icons/mingcute/loading-line')['default']
diff --git a/packages/assets/styles/utilities.scss b/packages/assets/styles/utilities.scss
index a4912ae01..deffc78ea 100644
--- a/packages/assets/styles/utilities.scss
+++ b/packages/assets/styles/utilities.scss
@@ -2440,6 +2440,10 @@
   padding-left: 0 !important;
 }
 
+.pl-0\.5 {
+  padding-left: 0.125rem !important;
+}
+
 .pl-1 {
   padding-left: 0.25rem !important;
 }
diff --git a/packages/business/src/components/MqlHelpDialog.vue b/packages/business/src/components/MqlHelpDialog.vue
new file mode 100644
index 000000000..67af2f2e0
--- /dev/null
+++ b/packages/business/src/components/MqlHelpDialog.vue
@@ -0,0 +1,324 @@
+<script setup lang="ts">
+import { useI18n } from '@tap/i18n'
+import { copyToClipboard } from '@tap/shared'
+import { computed, ref } from 'vue'
+
+defineOptions({ name: 'MqlHelpDialog' })
+
+const { t } = useI18n()
+
+const keyword = ref('')
+
+type Operator = {
+  name: string
+  descKey: string
+  example: string
+  related?: string[]
+}
+
+type Group = {
+  key: string
+  title: string
+  items: Operator[]
+}
+
+const groups = ref<Group[]>([
+  {
+    key: 'comparison',
+    title: t('packages_business_comparison'),
+    items: [
+      {
+        name: '$eq',
+        descKey: 'packages_business_mongo_operator_eq',
+        example: `{"price": {"$eq": 10}} // price 等于 10`,
+        related: ['$ne', '$in'],
+      },
+      {
+        name: '$ne',
+        descKey: 'packages_business_mongo_operator_ne',
+        example: `{"status": {"$ne": "archived"}} // status 不等于 archived`,
+        related: ['$eq'],
+      },
+      {
+        name: '$gt',
+        descKey: 'packages_business_mongo_operator_gt',
+        example: `{"age": {"$gt": 18}} // age 大于 18`,
+        related: ['$gte', '$lt'],
+      },
+      {
+        name: '$gte',
+        descKey: 'packages_business_mongo_operator_gte',
+        example: `{"score": {"$gte": 90}} // score 大于等于 90`,
+        related: ['$gt', '$lte'],
+      },
+      {
+        name: '$lt',
+        descKey: 'packages_business_mongo_operator_lt',
+        example: `{"age": {"$lt": 65}} // age 小于 65`,
+        related: ['$lte', '$gt'],
+      },
+      {
+        name: '$lte',
+        descKey: 'packages_business_mongo_operator_lte',
+        example: `{"price": {"$lte": 100}} // price 小于等于 100`,
+        related: ['$lt', '$gte'],
+      },
+      {
+        name: '$in',
+        descKey: 'packages_business_mongo_operator_in',
+        example: `{"category": {"$in": ["A", "B", "C"]}} // category 在 A, B, C 中`,
+        related: ['$nin', '$eq'],
+      },
+      {
+        name: '$nin',
+        descKey: 'packages_business_mongo_operator_nin',
+        example: `{"category": {"$nin": ["A", "B"]}} // category 不在 A, B 中`,
+        related: ['$in'],
+      },
+    ],
+  },
+  {
+    key: 'logical',
+    title: t('packages_business_logical'),
+    items: [
+      {
+        name: '$and',
+        descKey: 'packages_business_mongo_operator_and',
+        example: `{"$and": [{"age": {"$gt": 18}}, {"status": "A"}]}`,
+        related: ['$or', '$nor'],
+      },
+      {
+        name: '$or',
+        descKey: 'packages_business_mongo_operator_or',
+        example: '{"$or": [{"age": {"$lt": 18}}, {"status": "B"}]}',
+        related: ['$and', '$nor'],
+      },
+      {
+        name: '$nor',
+        descKey: 'packages_business_mongo_operator_nor',
+        example: '{"$nor": [{"price": {"$gt": 100}}, {"qty": {"$lt": 10}}]}',
+        related: ['$and', '$or'],
+      },
+    ],
+  },
+  {
+    key: 'element',
+    title: t('packages_business_element'),
+    items: [
+      {
+        name: '$exists',
+        descKey: 'packages_business_mongo_operator_exists',
+        example: `{"deletedAt": {"$exists": false}} // 字段不存在`,
+      },
+      {
+        name: '$type',
+        descKey: 'packages_business_mongo_operator_type',
+        example: `{"age": {"$type": "int"}} // 也可用数字代号，如 16 表示 int`,
+      },
+    ],
+  },
+  {
+    key: 'evaluation',
+    title: t('packages_business_evaluation'),
+    items: [
+      {
+        name: '$regex',
+        descKey: 'packages_business_mongo_operator_regex',
+        example: `{"name": {"$regex": "^A", "$options": "i"}} // 以 A 开头，忽略大小写`,
+      },
+    ],
+  },
+  {
+    key: 'array',
+    title: t('public_array'),
+    items: [
+      {
+        name: '$all',
+        descKey: 'packages_business_mongo_operator_all',
+        example: '{"tags": {"$all": ["red", "blue"]}}',
+      },
+      {
+        name: '$elemMatch',
+        descKey: 'packages_business_mongo_operator_elemMatch',
+        example:
+          '{"grades": {"$elemMatch": {"score": {"$gte": 80}, "mean": {"$gt": 75}}}}',
+      },
+      {
+        name: '$size',
+        descKey: 'packages_business_mongo_operator_size',
+        example: `{"tags": {"$size": 3}} // tags 数组长度为 3`,
+      },
+    ],
+  },
+  {
+    key: 'other',
+    title: t('public_others'),
+    items: [
+      {
+        name: '$mod',
+        descKey: 'packages_business_mongo_operator_mod',
+        example: `{"qty": {"$mod": [5, 0]}} // qty 能被 5 整除`,
+      },
+    ],
+  },
+])
+
+const filteredGroups = computed(() => {
+  const k = keyword.value.trim().toLowerCase()
+  if (!k) return groups.value
+  return groups.value
+    .map((g) => ({
+      ...g,
+      items: g.items.filter((op) =>
+        [op.name, ...(op.related || []), t(op.descKey)]
+          .join(' ')
+          .toLowerCase()
+          .includes(k),
+      ),
+    }))
+    .filter((g) => g.items.length)
+})
+
+function copy(text: string) {
+  copyToClipboard(
+    text.replace(/\/\/.*$/, '').trim(),
+    document.querySelector('#mql-help-dialog'),
+  )
+  ElMessage.success(t('public_message_copy_success'))
+}
+
+function open() {
+  visible.value = true
+}
+function close() {
+  visible.value = false
+}
+
+defineExpose({ open, close })
+</script>
+
+<template>
+  <ElDialog
+    append-to-body
+    :close-on-click-modal="false"
+    width="720px"
+    top="6vh"
+    :title="$t('package_business_mongodb_query_operators')"
+    class="px-0"
+    header-class="px-6"
+  >
+    <div id="mql-help-dialog" class="mql-help-dialog">
+      <div class="px-6">
+        <el-input
+          v-model="keyword"
+          clearable
+          class="mb-3"
+          :placeholder="$t('package_business_operators_search')"
+        >
+          <template #prefix>
+            <el-icon><i-mingcute:search-line /></el-icon>
+          </template>
+        </el-input>
+      </div>
+
+      <div class="px-6 overflow-y-auto" style="max-height: 72vh">
+        <div v-for="group in filteredGroups" :key="group.key" class="group">
+          <div
+            class="fw-sub py-2 mb-1 position-sticky top-0 bg-white z-10 pl-0.5"
+            style="margin-inline-start: -2px"
+          >
+            {{ group.title }}
+            <span class="text-caption">({{ group.items.length }})</span>
+          </div>
+          <div class="grid">
+            <div
+              v-for="op in group.items"
+              :key="op.name"
+              class="card p-3 rounded-xl shadow-sm"
+            >
+              <div class="card-head">
+                <code
+                  class="card-head-code fs-8 rounded-lg fw-sub border px-2 py-0.5"
+                >
+                  {{ op.name }}
+                </code>
+              </div>
+              <div class="desc mt-2">{{ t(op.descKey) }}</div>
+              <div class="example mt-2">
+                <div
+                  class="flex align-center justify-content-between mb-1 lh-6"
+                >
+                  <span class="fs-8 text-caption">{{
+                    $t('public_example')
+                  }}</span>
+                  <el-button
+                    class="copy-btn"
+                    text
+                    size="small"
+                    @click="copy(op.example)"
+                  >
+                    <el-icon class="mr-1"><i-mingcute:copy-2-line /></el-icon>
+                    {{ t('public_button_copy') }}
+                  </el-button>
+                </div>
+                <pre class="example-code p-2 rounded-lg">{{ op.example }}</pre>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+  </ElDialog>
+</template>
+
+<style lang="scss" scoped>
+.mql-help-dialog {
+  .group + .group {
+    margin-top: 12px;
+  }
+  .group-title {
+    color: var(--el-text-color-secondary);
+    margin: 8px 0 6px;
+  }
+  .grid {
+    display: grid;
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 12px;
+  }
+  .card {
+    border: 1px solid var(--el-border-color-lighter);
+    background: #fff;
+  }
+  .card-head {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+  }
+  .card-head-code {
+    line-height: 1rem;
+    border: 1px solid oklch(0.922 0 0);
+    background-color: oklch(98.5% 0 0);
+    font-family: var(--code-font-family);
+  }
+  .copy-btn {
+    display: none;
+  }
+  .card:hover .copy-btn {
+    display: inline-flex;
+  }
+  .desc {
+    color: var(--el-text-color-regular);
+  }
+  .example-code {
+    position: relative;
+    background: oklch(98.5% 0 0);
+    border: 1px solid oklch(0.922 0 0);
+  }
+  pre {
+    margin: 0;
+    font-size: 12px;
+    white-space: pre-wrap;
+    word-break: break-word;
+  }
+}
+</style>
diff --git a/packages/business/src/locale/lang/en.js b/packages/business/src/locale/lang/en.js
index 1b0833d03..66a1d21fa 100644
--- a/packages/business/src/locale/lang/en.js
+++ b/packages/business/src/locale/lang/en.js
@@ -1622,6 +1622,12 @@ export default {
   packages_business_data_source_monitor: 'Connection Monitor',
 
   // MongoDB operators
+  package_business_mongodb_query_operators: 'MongoDB Query Operators',
+  package_business_operators_search: 'Search operators',
+  packages_business_comparison: 'Comparison',
+  packages_business_logical: 'Logical',
+  packages_business_element: 'Element',
+  packages_business_evaluation: 'Evaluation',
   packages_business_mongo_operator_eq:
     'Matches values that are equal to a specified value.',
   packages_business_mongo_operator_gt:
@@ -1652,9 +1658,9 @@ export default {
   packages_business_mongo_operator_all:
     'Matches arrays that contain all elements specified in the query.',
   packages_business_mongo_operator_elemMatch:
-    'Selects documents if element in the array field matches all the specified conditions.',
+    'Matches arrays that contain at least one element satisfying all specified conditions.',
   packages_business_mongo_operator_size:
     'Selects documents if the array field is a specified size.',
   packages_business_mongo_operator_mod:
-    'Performs a modulo operation on the value of a field.',
+    'Performs a modulo match on a field value [divisor, remainder].',
 }
diff --git a/packages/business/src/locale/lang/zh-CN.js b/packages/business/src/locale/lang/zh-CN.js
index 6ecd1efe5..5406f6448 100644
--- a/packages/business/src/locale/lang/zh-CN.js
+++ b/packages/business/src/locale/lang/zh-CN.js
@@ -1446,6 +1446,12 @@ export default {
   packages_business_data_source_monitor: '数据源监控',
 
   // MongoDB 操作符
+  package_business_mongodb_query_operators: 'MongoDB 查询操作符',
+  package_business_operators_search: '搜索操作符',
+  packages_business_comparison: '比较',
+  packages_business_logical: '逻辑',
+  packages_business_element: '元素',
+  packages_business_evaluation: '表达式',
   packages_business_mongo_operator_eq: '匹配等于指定值的值',
   packages_business_mongo_operator_gt: '匹配大于指定值的值',
   packages_business_mongo_operator_gte: '匹配大于或等于指定值的值',
@@ -1461,7 +1467,8 @@ export default {
   packages_business_mongo_operator_type: '如果字段是指定类型，则选择文档',
   packages_business_mongo_operator_regex: '选择值匹配指定正则表达式的文档',
   packages_business_mongo_operator_all: '匹配包含查询中指定的所有元素的数组',
-  packages_business_mongo_operator_elemMatch: '如果数组字段中的元素匹配所有指定条件，则选择文档',
+  packages_business_mongo_operator_elemMatch:
+    '匹配数组中至少有一个元素满足所有给定条件',
   packages_business_mongo_operator_size: '如果数组字段是指定大小，则选择文档',
-  packages_business_mongo_operator_mod: '对字段值执行模运算',
+  packages_business_mongo_operator_mod: '对字段值做取模匹配 [除数, 余数]',
 }
diff --git a/packages/business/src/locale/lang/zh-TW.js b/packages/business/src/locale/lang/zh-TW.js
index af8b020fb..5db7e8f8a 100644
--- a/packages/business/src/locale/lang/zh-TW.js
+++ b/packages/business/src/locale/lang/zh-TW.js
@@ -1436,6 +1436,12 @@ export default {
   packages_business_data_source_monitor: '數據源監控',
 
   // MongoDB 操作符
+  package_business_mongodb_query_operators: 'MongoDB 查詢操作符',
+  package_business_operators_search: '搜索操作符',
+  packages_business_comparison: '比較',
+  packages_business_logical: '邏輯',
+  packages_business_element: '元素',
+  packages_business_evaluation: '表達式',
   packages_business_mongo_operator_eq: '匹配等於指定值的值',
   packages_business_mongo_operator_gt: '匹配大於指定值的值',
   packages_business_mongo_operator_gte: '匹配大於或等於指定值的值',
@@ -1451,7 +1457,8 @@ export default {
   packages_business_mongo_operator_type: '如果字段是指定類型，則選擇文檔',
   packages_business_mongo_operator_regex: '選擇值匹配指定正則表達式的文檔',
   packages_business_mongo_operator_all: '匹配包含查詢中指定的所有元素的數組',
-  packages_business_mongo_operator_elemMatch: '如果數組字段中的元素匹配所有指定條件，則選擇文檔',
+  packages_business_mongo_operator_elemMatch:
+    '匹配陣列中至少有一個元素滿足所有給定條件',
   packages_business_mongo_operator_size: '如果數組字段是指定大小，則選擇文檔',
-  packages_business_mongo_operator_mod: '對字段值執行模運算',
+  packages_business_mongo_operator_mod: '對字段值做取模匹配 [除數, 餘數]',
 }
diff --git a/packages/business/src/views/data-server/Drawer.vue b/packages/business/src/views/data-server/Drawer.vue
index 9cd798b76..387d21255 100644
--- a/packages/business/src/views/data-server/Drawer.vue
+++ b/packages/business/src/views/data-server/Drawer.vue
@@ -35,6 +35,7 @@ import {
   type Component,
 } from 'vue'
 import { DatabaseIcon } from '../../components/DatabaseIcon'
+import MqlHelpDialog from '../../components/MqlHelpDialog.vue'
 import ListSelect from '../api-application/ListSelect.vue'
 import MqlEditor from './MqlEditor.vue'
 import getTemplate from './template'
@@ -225,6 +226,7 @@ const mqlEditor = ref<any>(null)
 const containerRef = ref<HTMLElement | null>(null)
 const paramsTableRef = ref<InstanceType<typeof ElTable>>()
 const parameterSelectRef = ref<InstanceType<typeof ElSelect>[]>([])
+const helpVisible = ref(false)
 
 // Template refs
 const form_ref = ref()
@@ -1258,6 +1260,10 @@ function onFieldSelected(field: Field) {
     )
     .filter((f) => f.field_name !== field.field_name)
 }
+
+function openHelp() {
+  helpVisible.value = true
+}
 </script>
 
 <template>
@@ -1820,6 +1826,7 @@ function onFieldSelected(field: Field) {
           <!-- 筛选条件 -->
           <div
             class="data-server-panel__title mt-7 mb-3 align-items-center justify-content-start gap-3"
+            style="--btn-space: 0"
           >
             <span>{{
               $t('packages_business_data_server_drawer_shaixuantiaojian')
@@ -1840,15 +1847,20 @@ function onFieldSelected(field: Field) {
               ]"
             />
 
+            <div class="flex-1" />
+
             <el-button
               v-if="form.fullCustomQuery && isEdit"
               text
-              class="ml-auto"
               @click="handleFormat"
             >
               <el-icon class="mr-1"><i-mingcute:brush-line /></el-icon>
               {{ $t('public_format') }}
             </el-button>
+            <el-button v-if="form.fullCustomQuery" text @click="openHelp">
+              <el-icon class="mr-1"><i-mingcute:question-line /></el-icon>
+              {{ $t('public_button_help') }}
+            </el-button>
           </div>
           <template v-if="isEdit">
             <ul v-if="!form.fullCustomQuery" class="flex flex-column gap-2">
@@ -2153,6 +2165,8 @@ function onFieldSelected(field: Field) {
         >{{ $t('public_button_save') }}</ElButton
       >
     </template>
+
+    <MqlHelpDialog v-model="helpVisible" />
   </component>
 </template>
 
diff --git a/packages/i18n/src/locale/lang/en.js b/packages/i18n/src/locale/lang/en.js
index 115c485da..4930d4ae9 100644
--- a/packages/i18n/src/locale/lang/en.js
+++ b/packages/i18n/src/locale/lang/en.js
@@ -447,7 +447,7 @@ export default {
   public_search_api: 'Search API',
   public_quick_fill: 'Quick Fill',
   public_last_version: 'Last Version',
-  public_example: 'For example',
+  public_example: 'Example',
   public_placeholder_sdk_name: 'Please enter SDK name',
   public_placeholder_package_name: 'Please enter package name',
   public_placeholder_version: 'Please enter version',
@@ -514,4 +514,5 @@ export default {
   public_desc: 'DESC',
   public_select_field: 'Select Field',
   public_select_parameter: 'Select Parameter',
+  public_others: 'Others',
 }
diff --git a/packages/i18n/src/locale/lang/zh-CN.js b/packages/i18n/src/locale/lang/zh-CN.js
index 05f7db21e..8b39fc4ab 100644
--- a/packages/i18n/src/locale/lang/zh-CN.js
+++ b/packages/i18n/src/locale/lang/zh-CN.js
@@ -439,7 +439,7 @@ export default {
   public_search_api: '搜索 API',
   public_quick_fill: '快速填入',
   public_last_version: '上个版本',
-  public_example: '例如',
+  public_example: '示例',
   public_placeholder_sdk_name: '请输入 SDK 名称',
   public_placeholder_package_name: '请输入包名',
   public_placeholder_version: '请输入版本',
@@ -505,4 +505,5 @@ export default {
   public_desc: '降序',
   public_select_field: '选择字段',
   public_select_parameter: '选择参数',
+  public_others: '其他',
 }
diff --git a/packages/i18n/src/locale/lang/zh-TW.js b/packages/i18n/src/locale/lang/zh-TW.js
index f99d406c3..50312108b 100644
--- a/packages/i18n/src/locale/lang/zh-TW.js
+++ b/packages/i18n/src/locale/lang/zh-TW.js
@@ -438,7 +438,7 @@ export default {
   public_search_api: '搜索 API',
   public_quick_fill: '快速填入',
   public_last_version: '上個版本',
-  public_example: '例如',
+  public_example: '示例',
   public_placeholder_sdk_name: '請輸入 SDK 名稱',
   public_placeholder_package_name: '請輸入包名',
   public_placeholder_version: '請輸入版本',
@@ -504,4 +504,5 @@ export default {
   public_desc: '降序',
   public_select_field: '選擇字段',
   public_select_parameter: '選擇參數',
+  public_others: '其他',
 }