A gear incorporation system includes a robot to hold a gear from among gears including first and second gears that are not to be engaged with each other. The robot moves and attaches the gear to an attachment position. A control apparatus controls the robot and includes a first determiner, a temporary placer, and a turner. The first determiner determines whether the gears include an intermediate gear that is to be engaged between and with the first and second gears. When the first determiner determines that the gears include the intermediate gear, the temporary placer controls the robot to give priority to the first and second gears to attach them to respective attachment positions, and then to temporarily place the intermediate gear on the attachment position. The turner controls the robot to turn one of the first and second gears by a slight amount.