a method and apparatus for configuring service paths in a relay system , and a method for mobile station handover are provided . in the present invention , when it is determined that a mobile station is to be switched between a base station and a relay station attached thereto , or between different relay stations attached to the base station , the service paths are configured respectively between a handover source station and a mobile station and between a handover destination station and the mobile station and same data is transmitted by the base station . therefore , this method facilitates the mobile station to ensure service continuity in the process of handover .