diff --git a/web/src/components/originui/number-input.tsx b/web/src/components/originui/number-input.tsx
index 9f7ad6869..8017d32c7 100644
--- a/web/src/components/originui/number-input.tsx
+++ b/web/src/components/originui/number-input.tsx
@@ -6,6 +6,7 @@ interface NumberInputProps {
   value?: number;
   onChange?: (value: number) => void;
   height?: number | string;
+  min?: number;
 }
 
 const NumberInput: React.FC<NumberInputProps> = ({
@@ -13,6 +14,7 @@ const NumberInput: React.FC<NumberInputProps> = ({
   value: initialValue,
   onChange,
   height,
+  min = 0,
 }) => {
   const [value, setValue] = useState<number>(() => {
     return initialValue ?? 0;
@@ -76,6 +78,7 @@ const NumberInput: React.FC<NumberInputProps> = ({
         onChange={handleChange}
         className="w-full flex-1 text-center bg-transparent focus:outline-none"
         style={style}
+        min={min}
       />
       <button
         type="button"
diff --git a/web/src/locales/en.ts b/web/src/locales/en.ts
index 1e560e74b..f6fb0efc9 100644
--- a/web/src/locales/en.ts
+++ b/web/src/locales/en.ts
@@ -1062,7 +1062,7 @@ Example: https://fsn1.your-objectstorage.com`,
       apiKeyPlaceholder:
         'YOUR_API_KEY (obtained from https://serpapi.com/manage-api-key)',
       flowStart: 'Start',
-      flowNum: 'Num',
+      flowNum: 'N',
       test: 'Test',
       extractDepth: 'Extract Depth',
       format: 'Format',
diff --git a/web/src/pages/agent/constant/index.tsx b/web/src/pages/agent/constant/index.tsx
index 420b2060c..16ef78c99 100644
--- a/web/src/pages/agent/constant/index.tsx
+++ b/web/src/pages/agent/constant/index.tsx
@@ -8,6 +8,7 @@ import {
   AgentStructuredOutputField,
   CodeTemplateStrMap,
   ComparisonOperator,
+  JsonSchemaDataType,
   Operator,
   ProgrammingLanguage,
   SwitchOperatorOptions,
@@ -610,15 +611,15 @@ export const initialListOperationsValues = {
   query: '',
   operations: ListOperations.TopN,
   outputs: {
-    result: {
-      type: 'Array<?>',
-    },
-    first: {
-      type: '?',
-    },
-    last: {
-      type: '?',
-    },
+    // result: {
+    //   type: 'Array<?>',
+    // },
+    // first: {
+    //   type: '?',
+    // },
+    // last: {
+    //   type: '?',
+    // },
   },
 };
 
@@ -874,3 +875,22 @@ export enum ExportFileType {
   Markdown = 'md',
   DOCX = 'docx',
 }
+
+export enum TypesWithArray {
+  String = 'string',
+  Number = 'number',
+  Boolean = 'boolean',
+  Object = 'object',
+  ArrayString = 'array<string>',
+  ArrayNumber = 'array<number>',
+  ArrayBoolean = 'array<boolean>',
+  ArrayObject = 'array<object>',
+}
+
+export const ArrayFields = [
+  JsonSchemaDataType.Array,
+  TypesWithArray.ArrayBoolean,
+  TypesWithArray.ArrayNumber,
+  TypesWithArray.ArrayString,
+  TypesWithArray.ArrayObject,
+];
diff --git a/web/src/pages/agent/form/iteration-form/index.tsx b/web/src/pages/agent/form/iteration-form/index.tsx
index 6f51195b1..6132b7f5e 100644
--- a/web/src/pages/agent/form/iteration-form/index.tsx
+++ b/web/src/pages/agent/form/iteration-form/index.tsx
@@ -4,7 +4,7 @@ import { zodResolver } from '@hookform/resolvers/zod';
 import { memo, useMemo } from 'react';
 import { useForm, useWatch } from 'react-hook-form';
 import { z } from 'zod';
-import { JsonSchemaDataType } from '../../constant';
+import { ArrayFields } from '../../constant';
 import { INextOperatorForm } from '../../interface';
 import { FormWrapper } from '../components/form-wrapper';
 import { Output } from '../components/output';
@@ -44,7 +44,7 @@ function IterationForm({ node }: INextOperatorForm) {
         <FormContainer>
           <QueryVariable
             name="items_ref"
-            types={[JsonSchemaDataType.Array]}
+            types={ArrayFields as any[]}
           ></QueryVariable>
         </FormContainer>
         <DynamicOutput node={node}></DynamicOutput>
diff --git a/web/src/pages/agent/form/list-operations-form/index.tsx b/web/src/pages/agent/form/list-operations-form/index.tsx
index 5803fe055..afc44e907 100644
--- a/web/src/pages/agent/form/list-operations-form/index.tsx
+++ b/web/src/pages/agent/form/list-operations-form/index.tsx
@@ -13,20 +13,22 @@ import { Separator } from '@/components/ui/separator';
 import { useBuildSwitchOperatorOptions } from '@/hooks/logic-hooks/use-build-operator-options';
 import { buildOptions } from '@/utils/form';
 import { zodResolver } from '@hookform/resolvers/zod';
-import { memo } from 'react';
+import { memo, useCallback, useEffect, useMemo } from 'react';
 import { useForm, useWatch } from 'react-hook-form';
 import { useTranslation } from 'react-i18next';
 import { z } from 'zod';
 import {
+  ArrayFields,
   DataOperationsOperatorOptions,
-  JsonSchemaDataType,
   ListOperations,
   SortMethod,
   initialListOperationsValues,
 } from '../../constant';
 import { useFormValues } from '../../hooks/use-form-values';
+import { useGetVariableLabelOrTypeByValue } from '../../hooks/use-get-begin-query';
 import { useWatchFormChange } from '../../hooks/use-watch-form-change';
 import { INextOperatorForm } from '../../interface';
+import { getArrayElementType } from '../../utils';
 import { buildOutputList } from '../../utils/build-output-list';
 import { FormWrapper } from '../components/form-wrapper';
 import { Output, OutputSchema } from '../components/output';
@@ -36,7 +38,7 @@ import { QueryVariable } from '../components/query-variable';
 export const RetrievalPartialSchema = {
   query: z.string(),
   operations: z.string(),
-  n: z.number().int().min(0).optional(),
+  n: z.number().int().min(1).optional(),
   sort_method: z.string().optional(),
   filter: z
     .object({
@@ -47,26 +49,68 @@ export const RetrievalPartialSchema = {
   ...OutputSchema,
 };
 
+const NumFields = [
+  ListOperations.TopN,
+  ListOperations.Head,
+  ListOperations.Tail,
+];
+
+function showField(operations: string) {
+  const showNum = NumFields.includes(operations as ListOperations);
+  const showSortMethod = [ListOperations.Sort].includes(
+    operations as ListOperations,
+  );
+  const showFilter = [ListOperations.Filter].includes(
+    operations as ListOperations,
+  );
+
+  return {
+    showNum,
+    showSortMethod,
+    showFilter,
+  };
+}
+
 export const FormSchema = z.object(RetrievalPartialSchema);
 
 export type ListOperationsFormSchemaType = z.infer<typeof FormSchema>;
 
-const outputList = buildOutputList(initialListOperationsValues.outputs);
-
 function ListOperationsForm({ node }: INextOperatorForm) {
   const { t } = useTranslation();
 
+  const { getType } = useGetVariableLabelOrTypeByValue();
+
   const defaultValues = useFormValues(initialListOperationsValues, node);
 
   const form = useForm<ListOperationsFormSchemaType>({
     defaultValues: defaultValues,
     mode: 'onChange',
     resolver: zodResolver(FormSchema),
-    shouldUnregister: true,
+    // shouldUnregister: true,
   });
 
   const operations = useWatch({ control: form.control, name: 'operations' });
 
+  const query = useWatch({ control: form.control, name: 'query' });
+
+  const subType = getArrayElementType(getType(query));
+
+  const currentOutputs = useMemo(() => {
+    return {
+      result: {
+        type: `Array<${subType}>`,
+      },
+      first: {
+        type: subType,
+      },
+      last: {
+        type: subType,
+      },
+    };
+  }, [subType]);
+
+  const outputList = buildOutputList(currentOutputs);
+
   const ListOperationsOptions = buildOptions(
     ListOperations,
     t,
@@ -79,9 +123,39 @@ function ListOperationsForm({ node }: INextOperatorForm) {
     `flow.SortMethodOptions`,
     true,
   );
+
   const operatorOptions = useBuildSwitchOperatorOptions(
     DataOperationsOperatorOptions,
   );
+
+  const { showFilter, showNum, showSortMethod } = showField(operations);
+
+  const handleOperationsChange = useCallback(
+    (operations: string) => {
+      const { showFilter, showNum, showSortMethod } = showField(operations);
+
+      if (showNum) {
+        form.setValue('n', 1, { shouldDirty: true });
+      }
+
+      if (showSortMethod) {
+        form.setValue('sort_method', SortMethodOptions.at(0)?.value, {
+          shouldDirty: true,
+        });
+      }
+      if (showFilter) {
+        form.setValue('filter.operator', operatorOptions.at(0)?.value, {
+          shouldDirty: true,
+        });
+      }
+    },
+    [SortMethodOptions, form, operatorOptions],
+  );
+
+  useEffect(() => {
+    form.setValue('outputs', currentOutputs, { shouldDirty: true });
+  }, [currentOutputs, form]);
+
   useWatchFormChange(node?.id, form, true);
 
   return (
@@ -90,37 +164,46 @@ function ListOperationsForm({ node }: INextOperatorForm) {
         <QueryVariable
           name="query"
           className="flex-1"
-          types={[JsonSchemaDataType.Array]}
+          types={ArrayFields as any[]}
         ></QueryVariable>
         <Separator />
         <RAGFlowFormItem name="operations" label={t('flow.operations')}>
-          <SelectWithSearch options={ListOperationsOptions} />
+          {(field) => (
+            <SelectWithSearch
+              options={ListOperationsOptions}
+              value={field.value}
+              onChange={(val) => {
+                handleOperationsChange(val);
+                field.onChange(val);
+              }}
+            />
+          )}
         </RAGFlowFormItem>
-        {[
-          ListOperations.TopN,
-          ListOperations.Head,
-          ListOperations.Tail,
-        ].includes(operations as ListOperations) && (
+        {showNum && (
           <FormField
             control={form.control}
             name="n"
             render={({ field }) => (
               <FormItem>
-                <FormLabel>{t('flowNum')}</FormLabel>
+                <FormLabel>{t('flow.flowNum')}</FormLabel>
                 <FormControl>
-                  <NumberInput {...field} className="w-full"></NumberInput>
+                  <NumberInput
+                    {...field}
+                    className="w-full"
+                    min={1}
+                  ></NumberInput>
                 </FormControl>
                 <FormMessage />
               </FormItem>
             )}
           />
         )}
-        {[ListOperations.Sort].includes(operations as ListOperations) && (
+        {showSortMethod && (
           <RAGFlowFormItem name="sort_method" label={t('flow.sortMethod')}>
             <SelectWithSearch options={SortMethodOptions} />
           </RAGFlowFormItem>
         )}
-        {[ListOperations.Filter].includes(operations as ListOperations) && (
+        {showFilter && (
           <div className="flex items-center gap-2">
             <RAGFlowFormItem name="filter.operator" className="flex-1">
               <SelectWithSearch options={operatorOptions}></SelectWithSearch>
diff --git a/web/src/pages/agent/form/variable-assigner-form/dynamic-variables.tsx b/web/src/pages/agent/form/variable-assigner-form/dynamic-variables.tsx
index 8a01a7c07..4e6810a96 100644
--- a/web/src/pages/agent/form/variable-assigner-form/dynamic-variables.tsx
+++ b/web/src/pages/agent/form/variable-assigner-form/dynamic-variables.tsx
@@ -19,6 +19,7 @@ import {
   VariableAssignerLogicalOperator,
 } from '../../constant';
 import { useGetVariableLabelOrTypeByValue } from '../../hooks/use-get-begin-query';
+import { getArrayElementType } from '../../utils';
 import { DynamicFormHeader } from '../components/dynamic-fom-header';
 import { QueryVariable } from '../components/query-variable';
 import { useBuildLogicalOptions } from './use-build-logical-options';
@@ -152,9 +153,13 @@ export function DynamicVariables({
       } else if (
         logicalOperator === VariableAssignerLogicalArrayOperator.Append
       ) {
-        const subType = type.match(/<([^>]+)>/).at(1);
+        const subType = getArrayElementType(type);
         return (
-          <QueryVariable types={[subType]} hideLabel pureQuery></QueryVariable>
+          <QueryVariable
+            types={[subType as JsonSchemaDataType]}
+            hideLabel
+            pureQuery
+          ></QueryVariable>
         );
       }
     },
diff --git a/web/src/pages/agent/gobal-variable-sheet/constant.ts b/web/src/pages/agent/gobal-variable-sheet/constant.ts
index fc668e330..72a7d6342 100644
--- a/web/src/pages/agent/gobal-variable-sheet/constant.ts
+++ b/web/src/pages/agent/gobal-variable-sheet/constant.ts
@@ -1,6 +1,8 @@
 import { FormFieldConfig, FormFieldType } from '@/components/dynamic-form';
 import { buildSelectOptions } from '@/utils/component-util';
 import { t } from 'i18next';
+import { TypesWithArray } from '../constant';
+export { TypesWithArray } from '../constant';
 // const TypesWithoutArray = Object.values(JsonSchemaDataType).filter(
 //   (item) => item !== JsonSchemaDataType.Array,
 // );
@@ -9,17 +11,6 @@ import { t } from 'i18next';
 //   ...TypesWithoutArray.map((item) => `array<${item}>`),
 // ];
 
-export enum TypesWithArray {
-  String = 'string',
-  Number = 'number',
-  Boolean = 'boolean',
-  Object = 'object',
-  ArrayString = 'array<string>',
-  ArrayNumber = 'array<number>',
-  ArrayBoolean = 'array<boolean>',
-  ArrayObject = 'array<object>',
-}
-
 export const GlobalFormFields = [
   {
     label: t('flow.name'),
diff --git a/web/src/pages/agent/utils.ts b/web/src/pages/agent/utils.ts
index a7d4248ff..f40015012 100644
--- a/web/src/pages/agent/utils.ts
+++ b/web/src/pages/agent/utils.ts
@@ -732,3 +732,7 @@ export function buildBeginQueryWithObject(
 
   return nextInputs;
 }
+
+export function getArrayElementType(type: string) {
+  return typeof type === 'string' ? type.match(/<([^>]+)>/)?.at(1) ?? '' : '';
+}