Gravity works as long-range force and three-matter forces such as electromagnetic, weak and strong forces as short-range forces have link with each other in atom. Three matter forces have been unified successful. Quantum mechanics recognizes that gravity and three matter forces as the force-carrying particles interacting with each other develop matter in the universe, but gravity interacting with three matter forces becomes a great forces have not been pointed out in quantum mechanics. Researcher has fulfilled the gap proving that gravity being a weak force interacting with three matter forces develops three reactionary forces in gravity line, which jointly creates unified force that controls the solar system as well as the galaxy system.