A method performed by a terminal in a wireless communication system is provided. The method includes receiving configuration information for configuring one or more search space sets; identifying a connection between one or more PDCCH candidates of a first search space set and one or more PDCCH candidates of a second search space set, based on the configuration information; and monitoring the one or more PDCCH candidates of the first search space set and the one or more PDCCH candidates of the second search space set to receive repeated PDCCHs, wherein the one or more PDCCH candidates of the first search space set and the one or more PDCCH candidates of the second search space set are linked based on having a same aggregation level and a same PDCCH candidate index.