To decrease the man-hours for operating entrusted system developing business and to provide preferable operation environment for that purpose.

This system is equipped with a portable information terminal that a person in charge of sale has, an order reception and ordering server which communicates with the portable information terminal to manage the operation of the person in charge of sale and also manage the development of an ordered system, a credit server which receives information regarding a customer from the portable terminal and gives credit, and a distributing server which receives an instruction from the order reception and ordering server and distributes a message to the portable information terminal. The order reception and ordering server displays data for the order reception and ordering of system developing business and provides a homepage for inputting necessary data, the credit server decides the credit according to the data inputted to the homepage, and the distributing server distributes the credit examination result to the portable information terminal. Further, a system which distributes a page where the person in charge of sale inputs data and desired information to the portable information terminal is combined.