The invention discloses a method and a system for providing the current geographic position information of a broadband client end. The method comprises the following steps: a) an access server acquires circuit information of the client end; b) a Portal server enquires a geographic information database according to the circuit information given by the access server to acquire a query result of thegeographic position information; and c) the Portal server sends the query result of the geographic position information to the client end. The invention acquires the circuit information of the clientend when the client logs in through the access server, and tells the current geographic position of the client end through the Portal server when the client end is certificated, so as to realize geographic positioning of the client end and provide a new service type for WLAN network.