Abstract: In a vehicle management system, a user uses a portable telephone dedicated to the own vehicle to enter a specific number that is pre-set for the portable telephone. This automatically brings a control apparatus incorporated in a vehicle to a standby state for wireless communication. The control apparatus calls a central information management center. Data stored in control apparatuses interconnected over a network within the vehicle is transmitted to the central information management center through the portable telephone. The central information management center preserves vehicle information in one-to-one correspondence with users, and distributes the data to departments. The condition of each vehicle is thus managed. Moreover, information concerning the condition of a vehicle, such as, the maintained state of a vehicle and the presence or absence of a defect is provided for each user.