An operation method of a network node for supporting network discovery and selection of a user equipment (UE) includes receiving a network discovery and selection (NDS) rule request message requesting an NDS rule from the UE, transmitting a policy request message requesting NDS rule generation support information for generating the NDS rule to at least another network node, receiving a policy response message including the NDS rule generation support information from the at least another network node, generating an NDS rule on the basis of the NDS rule request message and the policy response message, and transmitting an NDS rule response message including the generated NDS rule to the UE.