To provide a service providing method capable of improve the profits and convenience of the whole by presenting appropriate information to a user, a vehicle parts plant and a dealer in a service management system for vehicle repairing work, etc.

The vehicle 2 is subjected to calculation of a vehicle fault diagnosis and a parts life duration according to information that can be acquired from a sensor and a control unit, and when the needs for vehicle repairing work occur, a repairing request is made to an information center 1. The information center 1 that has received the repairing request notifies a terminal of the dealer 4 of the repairing request to make the dealer 4 transmit a service condition. The dealer 4 responds to the repairing request and transmits the service condition of its own stop to the information center 1. The information center 1 relays to the user the received service condition in each dealer 4 and allows the user to select a desired service condition. Then, the information center 1 transmits signed agreement information to the dealer 4 who has presented the service condition selected by the user and mediates a contract with the user.