The present invention relates to a phys behavior iology feedback system for providing breath guiding signal and breath behavior information as a basis for the user to adjust breath behavior in a segment of breath training, and then a feedback loop is achieved. The system includes a wearable physiological sensing device that contains (1)at least a physiological sensing element disposed in the body of the user, in order to obtain a result of physiological information generated due to changes of breath behavior for the user, and (2)a perceived signal generating source for producing a perceived signal that contains a first information and a second information wherein, said perceived signal, exhibiting a breath guiding signal through the first information, and exhibiting the information related to breath behavior of the user through the second information, can allow the user to according to the first information to perform a breath behavior pattern , as well adjust breath behavior by self-awareness in accordance with the second information, for having an impact on the physiological state.本發明關於一種生理回饋系統,用以提供呼吸導引訊號以及呼吸行為資訊,以作為使用者在一呼吸訓練區段中進行呼吸行為調整的基礎,進而達成一回饋迴路,該系統包括一穿戴式生理感測裝置,具有至少一生理感測元件,設置於該使用者身上,以取得因使用者呼吸行為而產生變化的生理訊號,以及一可感知訊號產生源,用以產生包括一第一資訊以及一第二資訊的一可感知訊號,其中,該可感知訊號透過該第一資訊表現該呼吸導引訊號,以及透過該第二資訊表現該相關使用者呼吸行為的資訊,以讓使用者可根據該第一資訊而進行一呼吸行為模式,以及根據該第二資訊而透過自我意識調整其呼吸行為,以達成對生理狀態的影響。20‧‧‧呼吸動作感測元件22‧‧‧發光源