diff --git a/errors/errors.go b/errors/errors.go
index fa0ef74..aedb951 100644
--- a/errors/errors.go
+++ b/errors/errors.go
@@ -3,6 +3,7 @@ package errors
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"strconv"
 
@@ -94,3 +95,22 @@ func (m *multiError) Error() string {
 	m.text = goutil.BytesToString(bText)
 	return m.text
 }
+
+func (m *multiError) Is(target error) bool {
+	for _, e := range m.errs {
+		if errors.Is(e, target) {
+			return true
+		}
+	}
+	return false
+}
+
+
+func (m *multiError) As(target interface{}) bool{
+	for _, e := range m.errs {
+		if errors.As(e, target){
+			return true
+		}
+	}
+	return false
+}
diff --git a/errors/errors_test.go b/errors/errors_test.go
index 0102c40..1715c9a 100644
--- a/errors/errors_test.go
+++ b/errors/errors_test.go
@@ -3,14 +3,20 @@ package errors
 import (
 	"errors"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestErrors(t *testing.T) {
+	err1 := errors.New("error_text1")
+	err2 := errors.New("error not include")
+	err3 := New("error_text_3")
 	errs := []error{
-		errors.New("error_text1"),
 		errors.New("error_text2"),
 		nil,
 		errors.New("error_text4"),
+		err3,
+		err1,
 		errors.New("error_text5"),
 		nil,
 		errors.New("error_text7"),
@@ -21,4 +27,14 @@ func TestErrors(t *testing.T) {
 	t.Log(err)
 	err = Append(err, errs...)
 	t.Log(err)
+
+	is := errors.Is(err, err1)
+	assert.True(t, is)
+	is = errors.Is(err, err2)
+	assert.False(t, is)
+
+	target := &myerror{}
+	as := errors.As(err, &target)
+	assert.True(t, as)
+	assert.Equal(t, target, err3)
 }