The present invention relates to the wireless communication domain, a method for adding multicast broadcast service into a terminal of a wireless network and system thereof are disclosed, to lead the terminal to be capable of adding MBS service, and receiving MBS service content. In the present invention, the terminal acquires the MBS service parameter from the network side, wherein containing a first identification for indicating empty ora connection and a second identification for indicating service content, to lead the terminal to be capable of receiving MBS service content of the second identification indication from the empty ora connection in the first identification indication after receiving the MBS service parameter, and successfully adding the MBS service. The terminal is capable of initiating MBS service adding course through sending adding MBS service requested message, to acquire MBS service parameter and add desired MBS service; the network side can also initiate actively MBS service adding course, to send MBS service parameter to the terminal, and invite the terminal add MBS service.