A method is disclosed for performing comprehensive management for vehicles owned by clients, including an appropriate number of vehicles to be operated and appropriate operation methods, instead of simple maintenance and management of the vehicles, and according to this method, a vehicle managing apparatus, a
client terminal, a workshop terminal and a store terminal are connected via a communication network, and the vehicle managing apparatus includes information acceptance means, maintenance period calculation means,
business efficiency analyzation means and information providing means. First, the information acceptance means receives maintenance history information for a vehicle, automotive accessories purchase history information, vehicle operating
record information and business performance information for a
client, all of which are entered by the workshop terminal or the store terminal. Sequentially, the maintenance period calculation means calculates a maintenance period for the vehicle based on the maintenance history information, the purchase history information and the operating
record information, and the
business efficiency analyzation means analyzes
business efficiency based on the maintenance history information, the purchase history information, the operating
record information and the business performance information. Then, the information providing means transmits, to the
client terminal, the maintenance period calculation results and the business efficiency analysis results.