The disclosure relates to a 5G or 6G communication system for suPPorting a higher data transmission rate. The method of UE comPrises: receiving RRC message comPrising cell grouP configuration information for configuring a first cell grouP and a second cell grouP; determining whether a PHR triggering condition is satisfied; determining whether multiPle TRPs-based PUSCH rePetition related to a serving cell is configured for an arbitrary activated serving cell included in the first cell grouP and the second cell grouP, and whether a serving cell grouP to which the activated serving cell belongs is configured to enable the PHR for the multiPle TRPs; obtaining two Pieces of Power headroom related to the arbitrary activated serving cell; and transmitting a PHR MAC CE comPrising the two Pieces of Power headroom related to the arbitrary activated serving cell to the base station.