This invention relates to a physiological signal measurement system, which includes a signal generating unit that is used to generate a reference signal a measurement module that is coupled with the signal generating unit and a living body, and measures the physiological signal according to the reference signal to generate at least one measurement signal a sampling module that is coupled with the measurement module, and samples the measured signal to generate a sampling signal a signal processing module that is coupled with the sampling module, and processes the sampling signal to generate an output signal a control unit that is coupled with the sampling module and the signal processing module, and alternatively switches the sampling module and the signal processing module. By this way, this invention can use a digital manner to acquire and process the physiological signal of the living body and can effectively decrease the required sampling frequency so as to lower the manufacturing cost and the complexity of the measurement system.本發明係有關於一種生理訊號之量測系統,係由一訊號產生單元用以產生一參考訊號;一量測模組耦接訊號產生單元與一活體,並依據參考訊號而量測活體之生理訊號,產生至少一量測訊號;一取樣模組耦接量測模組並取樣量測訊號而產生一取樣訊號;一訊號處理模組耦接取樣模組,並處理該取樣訊號而產生一輸出訊號;一控制單元耦接取樣模組與訊號處理模組,並交互切換取樣模組與訊號處理模組運作。如此,本發明可以數位方式擷取並處理活體之生理訊號,並可有效降低所需的取樣頻率,進而降低量測系統製造成本與複雜度。10‧‧‧訊號產生單元20‧‧‧量測模組30‧‧‧取樣模組40‧‧‧訊號處理模組50‧‧‧控制單元