In accordance with another aspect of the disclosure, a base station in a wireless communication system is provided. The base station includes a transceiver and at least one processor configured to transmit first information including a list via the transceiver, the list including at least one identifier (ID) of at least one network group which is supported by the base station and provides an initial access to a non-public network (NPN) and receive, from a user equipment (UE), via the transceiver a request for connection to one network of a network group corresponding to at least one ID included in the list.

In accordance with another aspect of the disclosure, a method performed by a user equipment (UE) in a wireless communication system is provided. The method includes identifying preconfigured first information including a first list, the first list including at least one identifier (ID) of at least one network group providing an initial access to a non-public network (NPN), receiving, from at least one base station, second information including at least one second list, the at least one second list including at least one ID of at least one network group which is supported by the at least one base station and provides an initial access to the NPN, and selecting one network to be initially accessed from a network group corresponding to at least one ID included in the first list and the at least one second list, based on the first information and the second information.