A first network entity performing communication in a wireless communication system supporting a network slice, includes: memory storing instructions; and at least one processor, wherein the at least one processor is configured to execute the instructions to cause the first network entity to: receive, from a second network entity, a request to activate or deactivate a network slice instance (NSI) for a geographical coverage area; search for a list comprising at least one of: at least one network slice subnet instance (NSSI), or at least one network slice subnet management entity function (NSSMF); and send a request to a third network entity to activate or deactivate an NSSI, and wherein the at least one NSSI and the at least one NSSMF each support at least one of: the geographical coverage area, or an area code list mapped to the geographical coverage area.