Abstract: International academic cooperation can improve the efficiency of scientific research, and promote knowledge innovation. Exploring the contribution of a nation in international co-authored papers is thus of great significance to reflect the influence of that nation in the field and to improve the international cooperation. This paper constructs an analysis model of the academic contribution of international coauthors and countries from the perspective of both value and content. Taking China as the key research object and Web of Science as the data source, this paper analyzes the academic contribution of China in the field of information science and library science in the past ten years by constructing an international coauthor network and combining the formula of academic contribution, and reveals the evolution of topics of Chinese academic participation in the form of knowledge map. The results show that, in terms of numerical value, the academic contribution of China in the first stage is small, but in the second stage, China continues to make great efforts to become a rising star in international cooperation, and the academic contribution is second only to that of the United States. Meanwhile, in terms of content, through the evolution from theoretical research to technological innovation, the participating academic topics are diversified and indepth.