Apparatus and method for interlocking wireless lan and portable internet

An apparatus and a method for cooperatively operating a WLAN(Wireless LAN) and a wireless Internet to allow a WLAN(Wireless LAN) terminal to be connected to a WLAN AP(Access Point) to receive a WLAN service, without any change. A WLAN(110) performs an authentication procedure with respect to a WLAN terminal(500), and a WLAN DHCP(Dynamic Host Configuration Protocol) server(130) allocates a network address for the WLAN terminal. A wireless Internet authentication server(210) performs an authentication procedure with respect to a wireless Internet terminal, and a wireless Internet DHCP server(230) allocates a network address for the wireless Internet terminal. A base station(300) transmits/receives signals to/from the wireless Internet terminal in a radio communication area via a radio channel. A wireless Internet matching unit(410) is connected with the wireless Internet(200) to operate as a wireless Internet terminal with respect to the wireless Internet. When the WLAN terminal is connected to a WLAN matching unit(430), the WLAN matching unit operates as a WLAN AP with respect to the WLAN terminal and communicates with the WLAN terminal. An interworking unit(450) processes interworking between the wireless Internet matching unit and the WLAN matching unit. A WLAN authentication client(510) requests a service provider to authenticate the WLAN terminal. A WLAN DHCP client(530) requests the service provider to allocate a network address to the WLAN terminal.