To allow grasping a taxi fare and an arrival time, and also choosing a taxi company with favorable terms from a viewpoint of a taxi user.

In a searching system of taxi fare, by using a personal data assistant 10 on a customer side, a taxi fare searching request is transmitted to host computers 30, 40 and 50 installed in taxi companies via a host computer 20 for inquiry about taxi fare through Internet 70, so that a taxi company with more favorable terms is chosen by searching the fare of use of taxi, the arrival time to a riding point of the taxi and the required time riding in the taxi to a destination.