Abstract:As a tool which bears the innovation orientation of the government and the innovation resources, the science technology and innovation policy has a direct effect on the improvement of regional innovation capacity. Meanwhile, the analysis on the mechanism of effect is the foundation to improve the science technology and innovation policy and instruct the government to accomplish the innovational service transformation. In this paper, the mechanism model which reveals the impact of science technology and innovation policy on regional innovation capability is constructed with the system dynamics; and the influence mechanism of different innovation policies on regional innovation capacity is studied with the feedback control theory. It is found that the use of different instruments of science technology and innovation policy produces significant differences.