Disclosed are a communication technique for merging, with IoT technology, a 5G communication system supporting a data transmission rate higher than a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security and safety related services, and the like) on the basis of 5G communication technology and IoT-related technology. The present invention relates to a wireless communication system, and disclosed are a method and a device for performing retransmission when data for a first-type service is damaged by a second-type service data during transmission of the data for the first-type service in a communication system.