In this thesis, we use eigenvector method to capture the color of special object on the image retrieved by CCD. After processing with image recognition rules, the result is transmitted to remote servo motor to produce respective movement, and the goal of human machine interactive is achieved. The image tracking method used in this thesis is based on characteristic method; however, the method to obtain an object is different from characteristic method. Before sampling, the focus was to obtain appropriate RGB eigenvector. That is, if colored tag confirms with eigenvector, it is the target needed. Comparing with ordinary characteristic method, this method takes 0.0014 seconds more. But its credibility is increased and processing time needed afterward is reduced. This meets the design application for future research.