Abstract: A customer information control system of electronic equipment for controlling personal information and product identification information of the electronic equipment belonging to a customer, as customer management information, on a host machine, in which the electronic equipment automatically reads out the product identification information from a product identification information storing unit for storing the product identification information in a readable way and sends the product identification information and the personal information to the host machine as the customer management information, while the host machine receives the customer management information from the electronic equipment and when the customer management information has not been registered in a customer information database, registers the sent customer management information into the customer information database.