To impartially perform chargings in a business use and a private use by setting the charging destination of communication charge on the side of an operator.

When the operator of a portable information communication terminal 10-1 performs communication with a service computer 13, the matter that this communication is for a business use or a private use is designated by the operation screen of the portable information communication terminal 10-1. Thus, discrimination data showing the business use or the private use is transferred to an exchange 12 via a communication network 11. On the side of the exchange 12, the business use or the private use is judged based on the discrimination data and the charging destination in accordance with the judgment result is set to a control table 55.