diff --git a/validator/validator.go b/validator/validator.go
index f8aa029..c7433c6 100644
--- a/validator/validator.go
+++ b/validator/validator.go
@@ -18,6 +18,7 @@ import (
 var (
 	alphaMatcher         *regexp.Regexp = regexp.MustCompile(`^[a-zA-Z]+$`)
 	letterRegexMatcher   *regexp.Regexp = regexp.MustCompile(`[a-zA-Z]`)
+	numberRegexMatcher   *regexp.Regexp = regexp.MustCompile(`\d`)
 	intStrMatcher        *regexp.Regexp = regexp.MustCompile(`^[\+-]?\d+$`)
 	urlMatcher           *regexp.Regexp = regexp.MustCompile(`^((ftp|http|https?):\/\/)?(\S+(:\S*)?@)?((([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(([a-zA-Z0-9]+([-\.][a-zA-Z0-9]+)*)|((www\.)?))?(([a-z\x{00a1}-\x{ffff}0-9]+-?-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.([a-z\x{00a1}-\x{ffff}]{2,}))?))(:(\d{1,5}))?((\/|\?|#)[^\s]*)?$`)
 	dnsMatcher           *regexp.Regexp = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$`)
@@ -111,6 +112,12 @@ func ContainLetter(str string) bool {
 	return letterRegexMatcher.MatchString(str)
 }
 
+
+// ContainLetter check if the string contain at least one number.
+func ContainNumber(input string) bool {
+	return numberRegexMatcher.MatchString(input)
+}
+
 // IsJSON checks if the string is valid JSON.
 // Play: https://go.dev/play/p/8Kip1Itjiil
 func IsJSON(str string) bool {
diff --git a/validator/validator_example_test.go b/validator/validator_example_test.go
index 2a9e754..389777f 100644
--- a/validator/validator_example_test.go
+++ b/validator/validator_example_test.go
@@ -36,6 +36,24 @@ func ExampleContainLetter() {
 	// true
 }
 
+func ExampleContainNumber() {
+	result1 := ContainNumber("你好")
+	result2 := ContainNumber("&@#$%^&*")
+	result3 := ContainNumber("ab1")
+	result4 := ContainNumber("1234")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// false
+	// false
+	// true
+	// true
+}
+
 func ExampleContainLower() {
 	result1 := ContainLower("abc")
 	result2 := ContainLower("aBC")
diff --git a/validator/validator_test.go b/validator/validator_test.go
index b8a3f37..51703c1 100644
--- a/validator/validator_test.go
+++ b/validator/validator_test.go
@@ -86,6 +86,23 @@ func TestContainLetter(t *testing.T) {
 	assert.Equal(false, ContainLetter("&@#$%^&*"))
 }
 
+func TestContainNumber(t *testing.T) {
+	assert := internal.NewAssert(t, "TestContainNumber")
+
+	assert.Equal(true, ContainNumber("123"))
+	assert.Equal(true, ContainNumber("1Bc"))
+	assert.Equal(true, ContainNumber("a2c"))
+	assert.Equal(true, ContainNumber("ab3"))
+	assert.Equal(true, ContainNumber("a23"))
+	assert.Equal(true, ContainNumber("a23c"))
+	assert.Equal(true, ContainNumber("1%%%"))
+
+	assert.Equal(false, ContainNumber("ABC"))
+	assert.Equal(false, ContainNumber(""))
+	assert.Equal(false, ContainNumber("你好"))
+	assert.Equal(false, ContainNumber("&@#$%^&*"))
+}
+
 func TestIsJSON(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsJSON")