The present invention relates to a method and an apparatus for a first device transmitting and receiving data to/from one or more devices in a wireless communication system supporting vehicle to everything (V2X) service, and is characterised by the first device measuring an energy level of a first resource region for supporting the V2X service and transmitting a particular message via one or more resource regions of the first resource region and a second resource region based on the measurement result, wherein the second resource region represents a resource region for the first device transmitting the particular message to a second device via a network and the first resource region represents a resource region for the first device transmitting the particular message directly to the second device.