Taking ATMEG16A micro control unit (MCU) as a controller, an absolute location address system is designed for the requirements of accurate controlling optical motor displacement platforms. A stepping motor is used as a displacement platform motor. L293D is used as a driver in the motor and KW6A micro switch is used as a searching switch for zero position. The electrical level of the stepping motor is transmitted to L293D by IO port on the ATMEG16A to realize the accurate movement of the displacement platform. The zero location of the displacement platform is fixed through the micro switch to find absolute location address. From the repeat positioning accuracy measurement results of the displacement platform, when the positioning accuracy reaches 25 μm, the accurate positioning control for the absolute position address of the displacement platform is realized.