To meet the demand for stars detection by all-time optical measure equipment in the ship,and remove the problem of observable stars in the daytime by TV measurement as well as keep inertial navigation equipment emending its direction continuously ,so that Space Tracking,Telemetering and Commanding ships “YUAN WANG” can realize their sophisticated measuring and tracking,the technique of “real-time variable multi-levels spectrum filtering”,which can distinguish dark and small star target from the bright background of the sky,“the algorithm of dark and small target′s stable recognition”,which realizes quick and stable targets recognition and tracking,and “the methods in software radio design”,which realizes the composition of the processing system and the application of the algorithm are adopted. The optical measure equipment can detect the stars of magnitude 4.5 or even bigger ,and the amount of stars that can be detected in the daytime can reach 250 or more,based on that optical equipment′s aperture equals 180 mm and its focal length equals 3000 mm. The ability of maximum grades of star detection in the daytime can reach the grades in night,which expandes working ability of the optical equipment that now uses in ships to its limitation. The method can be popularized and applied in many other fields of dark and small targets detection by TV.