The present specification provides a method of performing physical downlink control channel (PDCCH) monitoring by a terminal in a wireless communication system, comprising the steps of: receiving, from a network, information related to power saving; and performing the PDCCH monitoring on the basis of the received information related to the power saving, wherein the information related to the power saving, which is a single piece of information, is information indicating at least one of whether the terminal is to perform a wake-up operation or whether the terminal is to perform a sleep operation.