Recently, a large number of international academic conferences have been held all over the world, and the number of conferences has been increasing year by year, which makes it difficult for us to overview the whole situation. On the other hand, explosive growth of the Internet makes it possible for us to obtain various information about conferences from the Web. In this paper, we propose a method for giving an overview of relation among conferences, such as clustering conferences and discovering the conference where active discussion is conducted in certain issues, by constructing a research map from conference information obtained from the Web.