The present disclosure relates to a communication technique of fusing a 5G communication system for supporting higher data transmission rate beyond a 4G system with an loT technology and a system thereof. The present disclosure may be used for an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the loT related technology The present disclosure provides a method for appropriately finding a network node providing services that user equipment (UE) wants in a 5G mobile communication system when a user initially accesses a G network. To this end, we propose a method for managing network deployment information and a method for transmitting an initial access request message with a detailed proposal technology. In addition, even when the service provided to the user equipment is modified after the initial access, a network node providing the corresponding service may be found in a similar manner.