diff --git a/feature_iter.go b/feature_iter.go
index d314aad..6e88914 100644
--- a/feature_iter.go
+++ b/feature_iter.go
@@ -1,6 +1,7 @@
 package jsoniter
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 )
@@ -273,6 +274,9 @@ func (iter *Iterator) Read() interface{} {
 	case String:
 		return iter.ReadString()
 	case Number:
+		if iter.cfg.configBeforeFrozen.UseNumber {
+			return json.Number(iter.readNumberAsString())
+		}
 		return iter.ReadFloat64()
 	case Nil:
 		iter.skipFourBytes('n', 'u', 'l', 'l')
diff --git a/jsoniter_iterator_test.go b/jsoniter_iterator_test.go
index 7c356aa..951574d 100644
--- a/jsoniter_iterator_test.go
+++ b/jsoniter_iterator_test.go
@@ -2,7 +2,12 @@ package jsoniter
 
 import (
 	"bytes"
+	"encoding/json"
+	"fmt"
+	"strconv"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func Test_bad_case(t *testing.T) {
@@ -33,3 +38,29 @@ func Test_bad_case(t *testing.T) {
 		t.Fatal(count)
 	}
 }
+
+func Test_iterator_use_number(t *testing.T) {
+	// Test UseNumber with iterator Read()
+	inputs := []string{`2147483647`, `-2147483648`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(Config{UseNumber: true}.Froze(), input)
+			expected := json.Number(input)
+			should.Equal(expected, iter.Read())
+		})
+	}
+}
+
+func Test_iterator_without_number(t *testing.T) {
+	inputs := []string{`2147483647`, `-2147483648`}
+	for _, input := range inputs {
+		t.Run(fmt.Sprintf("%v", input), func(t *testing.T) {
+			should := require.New(t)
+			iter := ParseString(ConfigDefault, input)
+			expected, err := strconv.ParseInt(input, 10, 32)
+			should.Nil(err)
+			should.Equal(float64(expected), iter.Read())
+		})
+	}
+}