a method and system for interconnecting a broadband wireless network with a wired network includes interconnecting a broadband wireless access network with an optical access broadband network at any reference point among reference points t , a , odn , and v in the oan broadband network , and interconnecting them with a digital subscriber line network by the reference point v in the dsl network . the method of the present invention can solve the problem of the interconnection between the worldwide interoperability for microwave access network and the oan broadband network , and the dsl network . an evolution approach is provided for the oan broadband network operator and the dsl network operator to develop the wimax network .