diff --git a/client/builders.go b/client/builders.go
index 43e13b16..87cf551f 100644
--- a/client/builders.go
+++ b/client/builders.go
@@ -395,7 +395,7 @@ func (c *QQClient) buildGroupSendingPacket(groupCode int64, r int32, m *message.
 }
 
 // ImgStore.GroupPicUp
-func (c *QQClient) buildGroupImageStorePacket(groupCode int64, md5 [16]byte, size int32) (uint16, []byte) {
+func (c *QQClient) buildGroupImageStorePacket(groupCode int64, md5 []byte, size int32) (uint16, []byte) {
 	seq := c.nextSeq()
 	name := utils.RandomString(16) + ".gif"
 	req := &pb.D388ReqBody{
@@ -405,7 +405,7 @@ func (c *QQClient) buildGroupImageStorePacket(groupCode int64, md5 [16]byte, siz
 			{
 				GroupCode:    groupCode,
 				SrcUin:       c.Uin,
-				FileMd5:      md5[:],
+				FileMd5:      md5,
 				FileSize:     int64(size),
 				FileName:     name,
 				SrcTerm:      5,
diff --git a/client/client.go b/client/client.go
index d741ca0f..1249e336 100644
--- a/client/client.go
+++ b/client/client.go
@@ -214,9 +214,9 @@ func (c *QQClient) SendGroupMessage(groupCode int64, m *message.SendingMessage)
 	return mid
 }
 
-func (c *QQClient) UploadGroupImage(groupUin int64, img []byte) (*message.GroupImageElement, error) {
+func (c *QQClient) UploadGroupImage(groupCode int64, img []byte) (*message.GroupImageElement, error) {
 	h := md5.Sum(img)
-	seq, pkt := c.buildGroupImageStorePacket(utils.ToGroupCode(groupUin), h, int32(len(img)))
+	seq, pkt := c.buildGroupImageStorePacket(groupCode, h[:], int32(len(img)))
 	r, err := c.sendAndWait(seq, pkt)
 	if err != nil {
 		return nil, err
@@ -266,6 +266,21 @@ func (c *QQClient) UploadGroupImage(groupUin int64, img []byte) (*message.GroupI
 	return nil, errors.New("upload failed")
 }
 
+func (c *QQClient) QueryGroupImage(groupCode int64, hash []byte, size int32) (*message.GroupImageElement, error) {
+	r, err := c.sendAndWait(c.buildGroupImageStorePacket(groupCode, hash, size))
+	if err != nil {
+		return nil, err
+	}
+	rsp := r.(groupImageUploadResponse)
+	if rsp.ResultCode != 0 {
+		return nil, errors.New(rsp.Message)
+	}
+	if rsp.IsExists {
+		return message.NewGroupImage(binary.CalculateImageResourceId(hash), hash), nil
+	}
+	return nil, errors.New("image not exists")
+}
+
 func (c *QQClient) ReloadGroupList() error {
 	c.groupListLock.Lock()
 	defer c.groupListLock.Unlock()