diff --git a/src/MeoAssistant/Controller.cpp b/src/MeoAssistant/Controller.cpp
index 8e9bb4e04c..e2c2bd1cef 100644
--- a/src/MeoAssistant/Controller.cpp
+++ b/src/MeoAssistant/Controller.cpp
@@ -791,6 +791,7 @@ void asst::Controller::clear_info() noexcept
     m_minitouch_avaiable = false;
     m_scale_size = { WindowWidthDefault, WindowHeightDefault };
     m_minitouch_props = decltype(m_minitouch_props)();
+    m_screencap_data_general_size = 0;
 }
 
 void asst::Controller::close_socket() noexcept
@@ -1009,6 +1010,10 @@ bool asst::Controller::screencap(const std::string& cmd, const DecodeFunc& decod
         return false;
     }
     auto& data = ret.value();
+    if (m_screencap_data_general_size && data.size() < m_screencap_data_general_size * 0.1) {
+        Log.error("data is too small!");
+        return false;
+    }
 
     bool tried_conversion = false;
     if (m_adb.screencap_end_of_line == AdbProperty::ScreencapEndOfLine::CRLF) {
@@ -1024,7 +1029,6 @@ bool asst::Controller::screencap(const std::string& cmd, const DecodeFunc& decod
             Log.info("screencap_end_of_line is LF");
             m_adb.screencap_end_of_line = AdbProperty::ScreencapEndOfLine::LF;
         }
-        return true;
     }
     else {
         Log.info("data is not empty, but image is empty");
@@ -1051,8 +1055,9 @@ bool asst::Controller::screencap(const std::string& cmd, const DecodeFunc& decod
             Log.info("screencap_end_of_line is changed to CRLF");
         }
         m_adb.screencap_end_of_line = AdbProperty::ScreencapEndOfLine::CRLF;
-        return true;
     }
+    m_screencap_data_general_size = data.size();
+    return true;
 }
 
 void asst::Controller::clear_lf_info()
diff --git a/src/MeoAssistant/Controller.h b/src/MeoAssistant/Controller.h
index 21ba3428f8..2f8f133f13 100644
--- a/src/MeoAssistant/Controller.h
+++ b/src/MeoAssistant/Controller.h
@@ -187,6 +187,7 @@ namespace asst
         bool m_support_socket = false;
         bool m_server_started = false;
         bool m_inited = false;
+        size_t m_screencap_data_general_size = 0;
 
         inline static int m_instance_count = 0;