It is reported that the wavefront aberration produced by atmosphere distortion can be cxxnpensated with nonlinear optics phase conjugate technology. And a dosed-loop connection between laser system and moving target can be established. The experiment in principle is completed, which laser trace and aim at moving target in the distance of 18 m with Stimulated Brillouin Scattering phase conjugate technology. The result indicate that the conjugating beam can be focused onto a small district not a large enianative ares like the singal beam.