A surgery system that includes a multiple-degree freedom slave arm, which is able to be mounted with a surgical instrument and includes a plurality of joints and a plurality of motors corresponding the respective joints of the plurality of joints; a first input device configured to operate the multiple-degree freedom slave arm; a second input device configured to operate the multiple-degree freedom slave arm and different from the first input device; and a controller configured to control the multiple-degree freedom slave arm so that the multiple-degree freedom slave arm is operated by one of the first input device and the second input device.