The disclosure relates to a method of performing communication in a wireless communication system. According to an embodiment of the disclosure, a terminal may receive physical downlink control channel (PDCCH) configuration information and rate matching configuration information from a base station, identify resource elements (REs) overlapping a rate matching resource from among REs included in PDCCH candidates, based on the PDCCH configuration information and the rate matching configuration information, and monitor a PDCCH candidate including the identified REs from among the PDCCH candidates, based on whether a number of ports of signals transmitted via the rate matching resource exceeds a preset value.