It is of great necessity to issue Supply-side Reform Policies for economy development nowadays. The policies has characterized by the essence of innovation-driven and founded on the theoretical basis of New Supply Economics. Through the research on theory of patent system and the development of American patent system, this paper concludes that patent system can drive innovation. Supply-side Reform Policies are important measures to promote innovation-driven development, and the key point lies in the innovation of science and technology. Patent system is the carrier of innovation of science and technology, which is correspondent with Supply-side Reform on innovation of science and technology. To play a role of guarantee for Supply-side Reform and innovation-driven development effectively, the patent system should be improved through the aspects of substantive rules, procedure rules and right remedies.