Abstract: In the grey system theory stochastic processes is regarded as grey processes.The theory uses the data character of extrinsic randomicity and holistic regularity to find out the intrinsic rules of the system.The research of motion optical tracking and prediction is important for many fields，such as aerocraft navigation，robot path planning and so on.A method based on grey model of equal dimensional innovation is introduced for optical tracking.The new method is analyzed in detail and proved to be effective by an object optical tracking experiment.Finally，two research points for the improvement of this prediction method are proposed.