The servo control system has coarse control unit (2a) and a fine control unit (3a). A differential gain is changed temporarily during a short period at an initial stage of fine control to shorten a settling time and to reduce overshoot. The servo control system includes a controlled system (1a) including a controlled object and a drive unit, a unit for controlling a speed of the controlled object to move and position the same to or adjacent a reference position, and a unit having a differential control circuit and for controlling a position of the controlled object to position the controlled object to the reference position, after the speed control unit moves the controlled object to or adjacent to the reference position.
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