Abstract: Innovation in modern society is basing on cooperation, as a result, scientific researchers will build a social network through cooperation among other researchers. Toward studying on the structure of this network, we can know more about researchers' cooperation rule to promote cooperation innovation. At present, research about cooperation network is mainly based on "overall net" method. But this cant answer the questions about what cooperation motivation, cooperation inclination and cooperation results are, so it needs "individual center net" method to complement. This article uses the research data from large-scale of investigation and individual-center net method to study cooperation network of China's scientific researchers.