A kind of detecting warning device, system has fixing piece, detector and attention device, the flow display barrel of fixing piece system positioning what transfusion apparatus, detector system is arranged in what fixing piece, when liquid level deficiency in flow indication cylinder, detector can wirelessly launch alerting to attention device, be ready for use through the point dropping liquid of attention device warning user's transfusion apparatus, user can replace in time.一種偵測警示裝置，係具有固定件、偵測器以及警示器，固定件係定位於點滴裝置之流量顯示筒，偵測器係設置於固定件內，當流量顯示筒內液面高度不足時，偵測器會以無線方式發射出警示訊號至警示器，透過警示器警示使用者點滴裝置之點滴液即將使用完畢，讓使用者可及時更換。
