Abstract:The China’s scientific and technology have made a remarkable achievements over the past 40 years of reform and opening up. The paper analyzes the achievements and existing problems of scientific and technological output in China during the past 40 years based on patent, and compare with United States, United Kingdom, Japan, France and Germany. The result showed that the total number of patents in China has far surpassed that of major developed countries such as the United States, United Kingdom, Japan, France, and Germany since the implementation of the Patent Law of the People’s Republic of China in 1984. However, China"s PCT patents only account for 1% of the total number of patents.