Abstract: Laser beams profile at focal plane can be controlled using active mirror in ICF system because the beam's profile has strong relationship with the surface of active mirror, the surface of active mirror can be changed at any time and maintained for a long time. In this paper, the capabilities of fitting given wave front (computed by Geometric Transformation Method) at conditions of different actuator numbers and different arrangements have been investigated by computer simulation. The computing results present that the needed laser profile can obtained by adaptive optical technology.