An actuator control system (100; 101; 102; 200; 300; 400) for controlling driving of an actuator based on a sensor output signal, the system comprising: a sensor output computation unit configured to perform a computation on the sensor output signal; a transmission control unit configured to transmit final data, which is a final result of the computation by the sensor output computation unit, and to transmit intermediate data before transmitting the final data; and a command value computation unit (25; 25a) configured to compute a command value for driving the actuator, based on the intermediate data and the final data transmitted by the transmission control unit, wherein the sensor output signal is a signal of a captured image obtained by capturing an image of a target object, characterized in that the sensor output computation unit performs: a first position detecting process that detects a position of the target object at a first level of precision; and a second position detecting process that detects a position of the target object at a level of precision that is higher than the first level of precision, wherein the intermediate data is a detection result of the first position detecting process, wherein the final data is a detection result of the second position detecting process, wherein the command value computation unit (25; 25a) computes a preliminary command value for preliminarily driving the actuator to a first position, based on the intermediate data, wherein the command value computation unit (25; 25a) computes a command value for driving the actuator to a second position, based on the intermediate data and the final data, and wherein the driving of the actuator is controlled to move at low velocity if the difference between the first position and the second position is small, and at high velocity if the difference between the first position and the second position is large. a sensor output computation unit configured to perform a computation on the sensor output signal; a transmission control unit configured to transmit final data, which is a final result of the computation by the sensor output computation unit, and to transmit intermediate data before transmitting the final data; and a command value computation unit (25; 25a) configured to compute a command value for driving the actuator, based on the intermediate data and the final data transmitted by the transmission control unit, wherein the sensor output signal is a signal of a captured image obtained by capturing an image of a target object, characterized in that the sensor output computation unit performs: a first position detecting process that detects a position of the target object at a first level of precision; and a second position detecting process that detects a position of the target object at a level of precision that is higher than the first level of precision, a first position detecting process that detects a position of the target object at a first level of precision; and a second position detecting process that detects a position of the target object at a level of precision that is higher than the first level of precision, wherein the intermediate data is a detection result of the first position detecting process, wherein the final data is a detection result of the second position detecting process, wherein the command value computation unit (25; 25a) computes a preliminary command value for preliminarily driving the actuator to a first position, based on the intermediate data, wherein the command value computation unit (25; 25a) computes a command value for driving the actuator to a second position, based on the intermediate data and the final data, and wherein the driving of the actuator is controlled to move at low velocity if the difference between the first position and the second position is small, and at high velocity if the difference between the first position and the second position is large.