diff --git a/float.go b/float.go
index 1fa853d..3f4fa39 100644
--- a/float.go
+++ b/float.go
@@ -26,7 +26,7 @@ type Float float64
 // Date : 14:36 2023/5/5
 func (f Float) ToFloat32() (float32, error) {
 	if f > math.MaxFloat32 || f < math.SmallestNonzeroFloat32 {
-		return 0, fmt.Errorf("float32 should between %v and %v", math.SmallestNonzeroFloat32, math.MaxFloat32)
+		return 0, fmt.Errorf("float32 should between %v and %v", float32(math.SmallestNonzeroFloat32), float32(math.MaxFloat32))
 	}
 	return float32(f), nil
 }
@@ -38,7 +38,7 @@ func (f Float) ToFloat32() (float32, error) {
 // Date : 14:36 2023/5/5
 func (f Float) ToFloat64() (float64, error) {
 	if f > math.MaxFloat64 || f < math.SmallestNonzeroFloat64 {
-		return 0, fmt.Errorf("float32 should between %v and %v", math.SmallestNonzeroFloat64, math.MaxFloat64)
+		return 0, fmt.Errorf("float32 should between %v and %v", float64(math.SmallestNonzeroFloat64), float64(math.MaxFloat64))
 	}
 	return float64(f), nil
 }
@@ -48,6 +48,10 @@ func (f Float) ToFloat64() (float64, error) {
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 14:38 2023/5/5
-func (f Float) ToString() string {
-	return fmt.Sprintf("%v", f)
+func (f Float) ToString() (string, error) {
+	floatVal, err := f.ToFloat64()
+	if nil != err {
+		return "", err
+	}
+	return fmt.Sprintf("%v", floatVal), nil
 }
diff --git a/int.go b/int.go
index bb4b32c..d581cc4 100644
--- a/int.go
+++ b/int.go
@@ -26,7 +26,7 @@ type Int int64
 // Date : 13:57 2023/5/5
 func (i Int) ToInt8() (int8, error) {
 	if math.MaxInt8 < int64(i) || math.MinInt8 > int64(i) {
-		return 0, fmt.Errorf("int8 value should between %v and %v ", math.MinInt8, math.MaxInt8)
+		return 0, fmt.Errorf("int8 value should between %v and %v ", int8(math.MinInt8), int8(math.MaxInt8))
 	}
 	return int8(i), nil
 }
@@ -38,7 +38,7 @@ func (i Int) ToInt8() (int8, error) {
 // Date : 14:05 2023/5/5
 func (i Int) ToInt16() (int16, error) {
 	if math.MaxInt16 < int64(i) || math.MinInt16 > int64(i) {
-		return 0, fmt.Errorf("int16 value should between %v and %v ", math.MinInt16, math.MaxInt16)
+		return 0, fmt.Errorf("int16 value should between %v and %v ", int16(math.MinInt16), int16(math.MaxInt16))
 	}
 	return int16(i), nil
 }
@@ -50,7 +50,7 @@ func (i Int) ToInt16() (int16, error) {
 // Date : 14:05 2023/5/5
 func (i Int) ToInt32() (int32, error) {
 	if math.MaxInt32 < int64(i) || math.MinInt32 > int64(i) {
-		return 0, fmt.Errorf("int32 value should between %v and %v ", math.MinInt32, math.MaxInt32)
+		return 0, fmt.Errorf("int32 value should between %v and %v ", int32(math.MinInt32), int32(math.MaxInt32))
 	}
 	return int32(i), nil
 }
@@ -62,7 +62,7 @@ func (i Int) ToInt32() (int32, error) {
 // Date : 14:06 2023/5/5
 func (i Int) ToInt64() (int64, error) {
 	if math.MaxInt64 < i || math.MinInt64 > i {
-		return 0, fmt.Errorf("int64 value should between %v and %v ", math.MinInt64, math.MaxInt64)
+		return 0, fmt.Errorf("int64 value should between %v and %v ", int64(math.MinInt64), int64(math.MaxInt64))
 	}
 	return int64(i), nil
 }
@@ -74,7 +74,7 @@ func (i Int) ToInt64() (int64, error) {
 // Date : 14:07 2023/5/5
 func (i Int) ToInt() (int, error) {
 	if math.MaxInt < i || math.MinInt > i {
-		return 0, fmt.Errorf("int value should between %v and %v ", math.MinInt, math.MaxInt)
+		return 0, fmt.Errorf("int value should between %v and %v ", int(math.MinInt), int(math.MaxInt))
 	}
 	return int(i), nil
 }
@@ -84,6 +84,10 @@ func (i Int) ToInt() (int, error) {
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 14:07 2023/5/5
-func (i Int) ToString() string {
-	return fmt.Sprintf("%v", i)
+func (i Int) ToString() (string, error) {
+	in64Val, err := i.ToInt64()
+	if nil != err {
+		return "", err
+	}
+	return fmt.Sprintf("%v", in64Val), nil
 }
diff --git a/uint.go b/uint.go
index c48be8d..0aace1f 100644
--- a/uint.go
+++ b/uint.go
@@ -26,7 +26,7 @@ type Uint uint64
 // Date : 14:21 2023/5/5
 func (ui Uint) ToUint8() (uint8, error) {
 	if ui > math.MaxUint8 || ui < 0 {
-		return 0, fmt.Errorf("uint8 should between 0 and %v", math.MaxUint8)
+		return 0, fmt.Errorf("uint8 should between 0 and %v", uint8(math.MaxUint8))
 	}
 	return uint8(ui), nil
 }
@@ -38,7 +38,7 @@ func (ui Uint) ToUint8() (uint8, error) {
 // Date : 14:25 2023/5/5
 func (ui Uint) ToUint16() (uint16, error) {
 	if ui > math.MaxUint16 || ui < 0 {
-		return 0, fmt.Errorf("uint16 should between 0 and %v", math.MaxUint16)
+		return 0, fmt.Errorf("uint16 should between 0 and %v", uint16(math.MaxUint16))
 	}
 	return uint16(ui), nil
 }
@@ -50,7 +50,7 @@ func (ui Uint) ToUint16() (uint16, error) {
 // Date : 14:25 2023/5/5
 func (ui Uint) ToUint32() (uint32, error) {
 	if ui > math.MaxUint32 || ui < 0 {
-		return 0, fmt.Errorf("uint32 should between 0 and %v", math.MaxUint32)
+		return 0, fmt.Errorf("uint32 should between 0 and %v", uint32(math.MaxUint32))
 	}
 	return uint32(ui), nil
 }
@@ -62,7 +62,7 @@ func (ui Uint) ToUint32() (uint32, error) {
 // Date : 14:30 2023/5/5
 func (ui Uint) ToUint64() (uint64, error) {
 	if ui > math.MaxUint64 || ui < 0 {
-		return 0, fmt.Errorf("uint64 should between 0 and %v", math.MaxUint64)
+		return 0, fmt.Errorf("uint64 should between 0 and %v", uint64(math.MaxUint64))
 	}
 	return uint64(ui), nil
 }
@@ -74,7 +74,7 @@ func (ui Uint) ToUint64() (uint64, error) {
 // Date : 14:31 2023/5/5
 func (ui Uint) ToUint() (uint, error) {
 	if ui > math.MaxUint || ui < 0 {
-		return 0, fmt.Errorf("uint should between 0 and %v", math.MaxUint)
+		return 0, fmt.Errorf("uint should between 0 and %v", uint(math.MaxUint))
 	}
 	return uint(ui), nil
 }
@@ -84,6 +84,10 @@ func (ui Uint) ToUint() (uint, error) {
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 14:32 2023/5/5
-func (ui Uint) ToString() string {
-	return fmt.Sprintf("%v", ui)
+func (ui Uint) ToString() (string, error) {
+	uint64Val, err := ui.ToUint64()
+	if nil != err {
+		return "", err
+	}
+	return fmt.Sprintf("%v", uint64Val), nil
 }