A method for transmitting data includes: acquiring a Multicast and Broadcast Service Mapping Information Element (MBS_MAP_IE) and MBS data corresponding to the MBS_MAP_IE; wherein the MBS_MAP_IE carries a parameter for indicating the frame position of the next MBS_MAP_IE; setting a sleep duration according to the parameter for indicating the frame position of the next MBS_MAP_IE; and acquiring the next MBS_MAP_IE and MBS data corresponding to the next MBS_MAP_IE when the sleep duration expires. By applying the present invention, it is unnecessary for a mobile terminal to receive an MBS mapping message, so that the sleep duration of the mobile terminal is increased and thus the power consumption of the mobile terminal is reduced.