To provide geographical information, geographical nonego and advertisement information which are requested by a client on the Internet together with an electronic map in real time.

In this method, the electronic map on which geographical nonego and advertisement information are displayed on electronic map information are prepared by a vector data system to be constructed as a database in a Web server 10. The server 10 receives the transfer of retrieval inquiry information for obtaining desired information from clients 30, 32, 34 which are connected online to the server 10, retrieves databases 22, 28 in the server 10, reads out electronic map information in which pertinent geographical information and advertisement information are displayed and provides them to the clients 30, 32, 34. When either one of the geographical nonego or advertisement information which are displayed on the electronic map is selected by the clients, 30, 32, 34, it is connected to Web resource information corresponding to the hyperlink information of the pertinent geographical nonego or the advertisement information.