diff --git a/packages/hooks/src/useCountDown/index.ts b/packages/hooks/src/useCountDown/index.ts
index bcb8866b76..2ed638e4d5 100644
--- a/packages/hooks/src/useCountDown/index.ts
+++ b/packages/hooks/src/useCountDown/index.ts
@@ -1,7 +1,7 @@
 import dayjs from 'dayjs';
 import { useEffect, useMemo, useState } from 'react';
 import useLatest from '../useLatest';
-import { isNumber } from '../utils/index';
+import { isNumber } from '../utils';
 
 export type TDate = dayjs.ConfigType;
 
diff --git a/packages/hooks/src/utils/__tests__/index.spec.ts b/packages/hooks/src/utils/__tests__/index.spec.ts
index fb63fc19f3..5c96cd79c2 100644
--- a/packages/hooks/src/utils/__tests__/index.spec.ts
+++ b/packages/hooks/src/utils/__tests__/index.spec.ts
@@ -1,5 +1,5 @@
 import { describe, expect, test } from 'vitest';
-import { isBoolean, isFunction, isNumber, isObject, isString, isUndef } from '../index';
+import { isBoolean, isFunction, isNumber, isObject, isString, isUndef } from '../';
 
 describe('shared utils methods', () => {
   test('isBoolean', () => {
@@ -21,7 +21,7 @@ describe('shared utils methods', () => {
   test('isNumber', () => {
     expect(isNumber(1)).toBe(true);
     expect(isNumber(Infinity)).toBe(true);
-    expect(isNumber(NaN)).toBe(true);
+    expect(isNumber(NaN)).toBe(false);
 
     expect(isNumber('str')).toBe(false);
     expect(isNumber({})).toBe(false);
diff --git a/packages/hooks/src/utils/index.ts b/packages/hooks/src/utils/index.ts
index 9cc2bcc7d3..0ffea4fade 100644
--- a/packages/hooks/src/utils/index.ts
+++ b/packages/hooks/src/utils/index.ts
@@ -4,5 +4,6 @@ export const isFunction = (value: unknown): value is (...args: any) => any =>
   typeof value === 'function';
 export const isString = (value: unknown): value is string => typeof value === 'string';
 export const isBoolean = (value: unknown): value is boolean => typeof value === 'boolean';
-export const isNumber = (value: unknown): value is number => typeof value === 'number';
+export const isNumber = (value: unknown): value is number =>
+  typeof value === 'number' && !Number.isNaN(value);
 export const isUndef = (value: unknown): value is undefined => typeof value === 'undefined';