1. An apparatus for controlling color registration sensors of an image forming apparatus, comprising: a transfer unit for transferring an electrostatic latent image onto a printing medium; at least one registration sensor for sensing image alignment errors by irradiating light to the transfer unit and sensing reflected light from the transfer unit; a sensor data storage unit for storing characteristics data of the at least one registration sensor; and a sensor control unit for controlling the at least one registration sensor based on the characteristics data of the at least one registration sensor, wherein the at least one registration sensor is placed into the transfer unit.