Actuator control system

The invention discloses provides an actuator control system, which comprises a controller, a actuator, an A/D (analog/digital) convertor and multiple control circuits, wherein the actuator is connected with output pins of the controller; the A/D convertor is connected with input pins of the controller and has a plurality of input pins; the control circuits are connected with a plurality of input pins of the A/D convertor. According to the control system provided by the invention, by performing extension on the input pins of the controller through the A/D convertor with the input pins, different control signals output by the control circuits can be received by the controller, and therefore the function extension of the controller is realized.