Disclosed are a communication scheme and a system thereof for converging an IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The disclosure may be applied to a smart service (for example, a smart home, a smart building, a smart city, a smart car or connected car, healthcare, digital education, retail business, a security and security related service, or the like) on the basis of a 5G communication technology and an IoT related technology. Disclosed are a method and apparatus for performing radio link monitoring (RLM) and radio link failure (RLF) in a vehicle communication (V2X) system.