A method for indicating a radio bearer (RB), implemented by a base station, includes: configuring at least one transmission function for an RB; configuring at least two transmission entities shared by the at least one transmission function; adding first information into a first indication message, the first information indicating the at least one transmission function and the at least two transmission entities; and sending the first indication message to a terminal to enable the terminal to set a transmission function and transmission entities corresponding to the RB according to the first indication message.