关键词: 科技信息，开放，保密，传播控制，信息交流，制度, Scientific and Technological Informatiion, Openness, Secrecy, Dissemination Control, Information Exchange, Institution

Abstract: Science and Technology(S&T) knowledge are playing more and more important role among all factors of production, while information revolution drives the speed of knowledge dissemination to a new record. As one important political issue, the production, distribution and usage of S&T knowledge reflects the multiple-role game play between scientists, researchers, their institutions, public, as well as government. Institution arrangements, affecting the dissemiantion of S&T information, include academic journal system, Intellectual Property system and national security system, with Openness and Secrecy locating at the two opposite pole. United States has the most developed and innovative S&T system. Through the perspective of Openness and Secrecy, this paper analyzes the dissemination control mechanism of S&T information of America and its impact to S&T innovation, and discusses possible reference significance to related policies of China.