An apparatus, method and system for matching subscriber states in network in which public land mobile network and wired/wireless private network are interworked are disclosed. The system matches subscriber state information of the public network to subscriber state information of the private network by allowing the private network to transmit state information of a mobile station toward the public network, the mobile station being located in a public and private cell area. The method includes the steps of a) allowing the private network to check state of a mobile station located in a public and private cell area and transmit the subscriber state information associated with the mobile station toward the public network; and b) allowing the public network to receive the subscriber state information and update the state of the mobile station in a visitor location register. The step a) is carried out when the state of the mobile station is changed or when an incoming signal from the public network is directed to the mobile station, which is in a local-area call connection state.