The GEKKO XII is the twelve beam laser of 30kJ, 50TW in red and 20kJ, 35TW in green with two target chambers. The direct and the indirect implosion experiments including the Cannonball targets and the cryogenic targets have been performed. The computer simulation of implosion processes has fully compared with the experimental data. As for the drivers, different kinds of wavelength laser 0.25µ to 10.6µ as well as the ion beam are provided. They are used to investigate the various coupling processes in plasmas. The ignition condition of inertial confinement fusion has been discussed and a concept design of the laser fusion reactor is presented.