An auxiliary system and method are provided for aiding sleep, in which a physiological parameter detection device is provided to detect a physiological parameter of a user, a audio wave comparison device is provided to receive the physiological parameter and compare with a plurality of audio waves stored therein to pick out at least one audio wave matches to the physiological parameter, so as to accordingly transmit an audio information to a communication device, so that the user can operate the communication device to choose the most favorite audio wave from the picked out audio wave(s) after the communication device receives the audio information.一種助眠系統及助眠方法,系統與方法主要係利用生理參數偵測裝置偵測使用者之生理參數,聲音資訊匹配裝置依據生理參數找出適合使用者之聲音資訊,並據以將聲音資訊傳送至近端裝置,使用者藉由近端裝置選擇聲音資訊後,觸發近端裝置將所選擇之聲音資訊傳送至播音裝置而使播音裝置播放聲音資訊,以供使用者聆聽。1‧‧‧助眠系統11‧‧‧生理參數偵測裝置12‧‧‧聲音資訊匹配裝置121‧‧‧第一傳輸模組122‧‧‧匹配儲存模組1221‧‧‧生理參數聲音比對表123‧‧‧第一處理模組13‧‧‧近端裝置131‧‧‧第二傳輸模組132‧‧‧顯示模組133‧‧‧第二處理模組14‧‧‧播音裝置141‧‧‧第三傳輸模組142‧‧‧播放模組S1‧‧‧生理參數信號S2‧‧‧第一聲音信號S3‧‧‧第二聲音信號
