diff --git a/marketing-api/model/creative/image_material.go b/marketing-api/model/creative/image_material.go
index 972c7796..bcd3ac81 100644
--- a/marketing-api/model/creative/image_material.go
+++ b/marketing-api/model/creative/image_material.go
@@ -1,17 +1,66 @@
 package creative
 
-import "github.com/bububa/oceanengine/marketing-api/enum"
+import (
+	"encoding/json"
+
+	"github.com/bububa/oceanengine/marketing-api/enum"
+)
 
 // ImageMaterial 创意图片素材
 type ImageMaterial struct {
 	// ImageMode 素材类型，必填，注意：程序化创意不支持组图 CREATIVE_IMAGE_MODE_GROUP，其他类型图片都支持，如横版/竖版大图、小图。详见【附录-素材类型】
 	ImageMode enum.ImageMode `json:"image_mode,omitempty"`
 	// ImageInfo 图片素材信息
-	ImageInfo *ImageInfo `json:"image_info,omitempty"`
+	ImageInfo *ImageInfoWrapper `json:"image_info,omitempty"`
 	// TemplateImage 图片模版信息，创建DPA创意时可传入,选择模板后image_info传入内容无效
 	TemplateImage *TemplateImage `json:"template_imate,omitempty"`
 }
 
+// ImageInfoWrapper image_info wrapper
+// image_info 可能为slice也可能为object
+type ImageInfoWrapper struct {
+	Object *ImageInfo
+	List   []ImageInfo
+}
+
+func (i *ImageInfoWrapper) IsObject() bool {
+	return i.Object != nil
+}
+
+// UnmarshalJSON implement json Unmarshal interface
+func (i *ImageInfoWrapper) UnmarshalJSON(b []byte) (err error) {
+	var ret ImageInfoWrapper
+	if b[0] == '[' && b[len(b)-1] == ']' {
+		if err := json.Unmarshal(b, &ret.List); err != nil {
+			return err
+		}
+	} else if b[0] == '{' && b[len(b)-1] == '}' {
+		ret.Object = new(ImageInfo)
+		if err := json.Unmarshal(b, ret.Object); err != nil {
+			return err
+		}
+	}
+	if ret.Object == nil && len(ret.List) == 0 {
+		i = nil
+	} else {
+		*i = ret
+	}
+	return nil
+}
+
+// MmarshalJSON implement json Marshal interface
+func (i *ImageInfoWrapper) MarshalJSON() ([]byte, error) {
+	if i.Object != nil {
+		return json.Marshal(i.Object)
+	} else if len(i.List) == 0 {
+		return []byte("null"), nil
+	}
+	return json.Marshal(i.List)
+}
+
+var _ json.Unmarshaler = (*ImageInfoWrapper)(nil)
+var _ json.Marshaler = (*ImageInfoWrapper)(nil)
+
 // ImageInfo 图片素材信息
 type ImageInfo struct {
 	// ImageMode 素材类型，必填，注意：程序化创意不支持组图 CREATIVE_IMAGE_MODE_GROUP，其他类型图片都支持，如横版/竖版大图、小图。详见【附录-素材类型】
diff --git a/marketing-api/model/creative/image_material_test.go b/marketing-api/model/creative/image_material_test.go
new file mode 100644
index 00000000..d36042aa
--- /dev/null
+++ b/marketing-api/model/creative/image_material_test.go
@@ -0,0 +1,46 @@
+package creative
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestImageMaterialMarshaler(t *testing.T) {
+	encs := []string{`{"image_info":[{"image_id":"test"}]}`, `{"image_info":{"image_id":"test"}}`, `{}`}
+	objs := []ImageMaterial{
+		{
+			ImageInfo: &ImageInfoWrapper{
+				List: []ImageInfo{
+					{
+						ImageID: "test",
+					},
+				},
+			},
+		},
+		{
+			ImageInfo: &ImageInfoWrapper{
+				Object: &ImageInfo{
+					ImageID: "test",
+				},
+			},
+		},
+		{
+			ImageInfo: nil,
+		},
+	}
+	for idx, enc := range encs {
+		if bs, err := json.Marshal(objs[idx]); err != nil {
+			t.Error(err)
+		} else if string(bs) != enc {
+			t.Errorf("expect:%s, got:%s", enc, string(bs))
+		}
+		var obj ImageMaterial
+		if err := json.Unmarshal([]byte(enc), &obj); err != nil {
+			t.Error(err)
+		} else if objs[idx].ImageInfo != nil && obj.ImageInfo == nil || objs[idx].ImageInfo == nil && obj.ImageInfo != nil {
+			t.Errorf("case:%s, expect: %+v, got: %+v\n", enc, objs[idx], obj)
+		} else if objs[idx].ImageInfo != nil && obj.ImageInfo != nil && objs[idx].ImageInfo.IsObject() != obj.ImageInfo.IsObject() {
+			t.Errorf("case: %s, expect: %+v, got: %+v\n", enc, objs[idx].ImageInfo, obj.ImageInfo)
+		}
+	}
+}