A method and an apparatus for providing a service in a wireless communication system are disclosed. The method and apparatus are directed to converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of things (IoT). The apparatus includes a terminal in the wireless communication system. The terminal includes a transceiver configured to transmit and receive a signal, and a processor configured to receive a first service request related to mission critical push to talk over LTE (MCPTT) over long term evolution (LTE), determine whether a first service corresponding to the first service request and a second service request being currently performed are simultaneously provided, and process the first service and the second service based on a priority of each of the service, services if the first service and the second service are not simultaneously provided.