The disclosure relates to converging a 5G communication system for supporting higher data rates beyond a 4G system with a technology for IoT, and may be applied to intelligent services based on the 5G communication technology and IoT-related technology. A method is provided, which improves coverage of a PDCCH in a wireless communication system and a method of repeatedly transmitting the PDCCH. When a PDCCH is repeatedly transmitted, a method is provided for determining a PDSCH processing time and a PUSCH preparation time considered by a UE is provided, and thus, a more efficient communication system can be implemented.