The present disclosure provides a method of transmitting and receiving user equipment (UE) assistance information in a wireless communication system, the method including: receiving, from a base station, information about at least one power saving mode candidate set; selecting at least one of the at least one power saving mode candidate set; transmitting, to the base station, UE assistance information including information about the selected at least one power saving mode candidate; and performing communication with the base station based on a power saving mode determined by the base station based on the UE assistance information.