To instruct a travel route up to a destination for a taxi without being transmitted as an oral message.

A terminal route specifying information database is provided in a mobile terminal, in the present invention. When two-point specifying information is input, route specifying information corresponding thereto is obtained from the terminal route specifying information database when the two-point specifying information is recorded in the terminal route specifying information database, and the route specifying information is obtained from a route specifying information providing support device when not recorded. The two-point specifying information and the obtained route specifying information are transmitted to a route display 3. The display 3 detects a route fit to the transmitted route specifying information out of the plurality of routes from a start point up to the destination, based on the two-point specifying information and the route specifying information transmitted hereinbefore, and map information, and points out the route plainly.