The arrection method of two adaptive optics (AO) systems in series was put forward. An AO system with feed forward control loop was connected to an AO system with feed back control loop by a community wave front corrector. The control performances and the transfer characteristics of noise by this method were analyzed. The method of two AO system in series isn′t much more complex technically than normal method of single AO system, but the control performance of the two systems in series is improved greatly in comparison with single AO system. The simulation results with practical experimental data on the 61-element AO system verify the availability of the method.