A method for providing a vehicle-to-everything (V2X) service in a 5G mobile communication system. In accordance with an aspect of the disclosure, a method performed by a device for performing a network exposure function (NEF) in a communication system, the method comprising: receiving, from a server, a request message including request information related to service-specific information; changing data in a unified data repository (UDR) on the basis of the request message; and performing provisioning of the changed data to a user equipment (UE) via a policy control function (PCF) is provided.