A control device of a robot system including a plurality of robots having servo motors of a plurality of axes. The control device includes a plurality of controllers each having a plurality of servo amplifiers that drives the servo motors of the plurality of axes of the robots, and a control unit that controls the plurality of servo amplifiers. The control unit determines a driving number of the servo motors of the plurality of axes in accordance with the robots connected to the controllers, and sets a parameter for the servo amplifiers that drive the axes of the servo motors of a number corresponding to the determined driving number.
