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in this paper, based on some important facts which influence the relation between supply and demand for information, we suggest some statistical date to determine the geographical centers of information supply and demand with the formula of gravity center. By means of this approach, we can get the geographical centers of supply and demand resp, and find that the supply center for information is far away from the demand center. According to the results, we put forward a scheme of macrographically modu1ating and controlling these centers to improve the national information system in China.
in this paper, based on some important facts which influence the relation between supply and demand for information, we suggest some statistical date to determine the geographical centers of information supply and demand with the formula of gravity center. get the geographical centers of supply and demand resp, and find that the supply center for information is far away from the demand center, according to the results, we put forward a scheme of macrographically modu1ating and controlling these centers to improve the national information system in China.