WLAN (Wireless Local Area Network) resource sharing method and WLAN network system

The invention discloses a WLAN (Wireless Local Area Network) resource sharing method and a WLAN network system, wherein the method comprises the steps of: broadcast-identifying different access identifiers of each operation network by using an access point device; searching the access identifier of each operation network by users in the operation network respectively and transmitting the searched access identifier and user data to the access point device together; transparently transmitting the received data to an access controller by the access point device; respectively mapping the data to configured VLAN (Virtual Local Area Network) passages corresponding to different access identifiers by the access controller according to the access identifiers in the received data; and respectively transmitting the data of each operation network to a broadband access server of each operation network through a port of the access controller bonded with the VLAN passages. The invention realizes the peer-to-peer fair of resources, the guaranteed network quality, the operation possibility, the controllable possibility and the expandable upgrade of a plurality of telecom operators simultaneously accessed into the WLAN network in the same region.