An automatic call synchronization system and method, in which a mobile terminal (101) transmits, when receiving an incoming calling signal and determining that an automatic call synchronization function is turn on, to a wireless signal transponder (104) a call synchronization request carrying the identification information of the mobile terminal (101) and the call information; the pattern recognizer (103), which is connected with the wireless signal transponder (104), authenticates the mobile terminal (101) according to the identification information of the mobile terminal (101), and transmits to a fixed terminal (102) a call access request carrying the identification information of the mobile terminal (101) and the call information through the wireless signal transponder (104) after the authentication is successful; the fixed terminal (102) calls the user of the mobile terminal (101) according to the identification information and the call information, and transmits, when the call is answered by the user using the fixed terminal (102), to the wireless signal transponder (104) a call access response and implements the conversation through a fixed phone operation network matched with the fixed terminal (102). In this way, the call charge may be saved, and automatically performing the call synchronization has flexibility and convenience, thus bringing convenience to the user.