The present invention provides an accurate tracking technique of moving target based on image characteristic, and particularly provides a visual accurate tracking technique based on double parameter thresholds dividing. An image processing method which combines the H and S double parameter threshold dividing and distance filtering is adopted. Only one visual sensor which is provided on the movingobject tracker for executing real-time tracking to the reference moving object thereby realizing the accurate positioning to the moving target. The method of the invention has the advantages of excellent simpleness, excellent real-time property and high tracking precision.