An embodiment of the present invention relates to a method for transmitting/receiving an IP multimedia subsystem (IMS) voice support-related signal by a next generation-radio access network (NG-RAN) in a wireless communication system, the method comprising the steps of: receiving, by the NG-RAN, a request associated with a UE capability for IMS voice from an AMF; checking, by the NG-RAN, whether the UE capability matches network configurations; and transmitting, by the NG-RAN, a response including the result of the check to the AMF, wherein the network configurations include a network configuration for the NG-RAN and a network configuration for a network node which enables IMS voice even when the NG-RAN does not support IMS voice.