Abstract: To facilitate location of establishment information, road map files are stored in a first memory, whereas establishment data for each of a plurality of establishments that are located in any of the road map files are stored in a second memory. The establishment data are classified geographically and include map location data that define a location of the corresponding establishment in any of the road map files. A third memory stores an establishment tag command for each of the establishments. A first processing unit receives a road map request from a user terminal. A second processing unit generates road map HTML that is provided to the user terminal so as that the latter can display a selected road map file according to the road map request and, if any one of the establishment data is encompassed by the selected road map file, so that the user terminal can display an index point at the location defined by the map location data of the encompassed establishment data.