A method for supporting by a temporarily serving base station an initial access of a terminal in a wireless communication system, according to an embodiment of the present invention, comprises the steps of: determining whether or not a terminal, which requests a radio resource control (RRC) connection establishment for an initial access, supports a predetermined service; if the terminal supports the predetermined service, requesting a load status report to candidate base stations that can be accessed by the terminal; requesting to the candidate base stations multiple connection establishment with the terminal on the basis of the load status report obtained from the candidate base stations; determining a base station for establishing of serving link with the terminal on the basis of the response to the multiple connection establishment request; and transmitting to the terminal an RRC connection establishment response message which comprises information about the base station for the establishment of the serving link.