An embodiment of the present invention provides a method for supporting non-access stratum (NAS) signaling of a user equipment (UE) by a base station in a wireless communication system, the method comprising the steps of: transmitting, to the UE, information for supporting a connection to a next generation (NG) core; receiving a NAS-related message from the UE; performing one of MME selection and AMF selection according to whether the NAS-related message includes information regarding the use of NAS; and transmitting an NAS message to an MMF or an AMF which is determined as a result of performing one of the MME selection and the AMF selection.