The present invention relates to a multicast and broadcast service (MCBCS) system and method. According to the present invention, the MCBCS system comprises: an MBS distribution DPF (Data Patch Function) for receiving MBS data from an MCBCS server/controller and distributing the data; an MBS synchronization controller for acquiring GRE (Generic Routing Encapsulation) for the MBS data from the MBS distribution DPF and then generating an MBS synchronization rule; an MBS synchronization executor for executing MBS synchronization on the MBS synchronization rule received from the MBS synchronization controller; and an MBS DPF for receiving MBS data from the MBS distribution DPF, packaging the MBS data into an MBS burst and then transmitting the data to an MS (Mobile station). As such, multicast and broadcast services can be provided efficiently.