To analyze the two basic characters of information abundance and reachness, build and explain the information utility indifference curve of information abundance and reachness combination, put forward the information combination must be evolved higher utility based on the advancement of information technology, and carries through game analysis of enterprise behavior of realizing information combination the most utility. This will help Enterprise to realize the maximization of information combination utility by means of merging, forming a virtual enterprise with other enterprise and other different means.