Disclosed is a method by which a terminal receives a physical downlink control channel (PDCCH) in a wireless communication system. In particular, the method is characterized by comprising: receiving downlink control information (DCI) including a bit field related to PDCCH monitoring adaptation; determining a PDCCH monitoring adaptation operation on the basis of the value of the bit field; and receiving the PDCCH on the basis of the PDCCH monitoring adaptation operation, wherein the number of bits included in the bit field is determined on the basis of the format of the DCI.