The principle of an adaptive optics (AO) system with two sets of wavefront correctors for all-path aberration correction is analyzed. The measured wavefront information by two sets of Hartmann-Shack wavefront sensors is fused, and the optimized formula of the aberrations corrected by two sets of wavefront correctors is deduced. The performance of the AO system with two sets of wavefront correctors for all-path aberration correction is simulated. The result is compared with that of the AO system with a single corrector. The simulation result indicates the formula is right and the two sets of wavefront correctors can be decoupled. The correction performance is the same as that of AO system with a single deformable mirror with ideal stroke.