生物感測器是將生物元件裝置在感測的系統上，以達到輸出訊號與分析的目的，此乃結合生物醫學與工程科技於一體的技術。本文將介紹生物感測器原理、種類、界面與量測技術等，其中由換能器換能機制的不同，亦將包括電化學、壓電晶體與光學生物感測器等。生物感測器的設計希望能達到快速、穩定、操作方便，且高專一性、高選擇性與高靈敏度，以廣泛地應用於藥物開發、免疫檢測、食品與農業、環境監測，以及軍事防禦等用途。

The biosensor is the biological element that is assembled on the sensor system. The whole system combines the biomedical and engineering technologies. This report describes the biosensor technologies which include the principle type, interface and measuring systems. Some types will be presented, including the electrochemical, piezoelectric and optical biosensors. The biosensor will be designed for the purpose that the detection is fast, stable, high specificity, high selectivity, high sensitivity and user friendliness, which can be widely applied in the medical development, immunoassay, drug screening, agriculture industry and environment monitoring.