ELECTRONIC VALUE CONTROL SYSTEM, CARD TERMINAL DEVICE AND HOST DEVICE

摘要

PROBLEM TO BE SOLVED: To minimize the labor of loading the electronic value of an IC card by automatically loading the electronic value at every settlement of a debit or credit. SOLUTION: An instant payment card terminal device 200 performs a price settlement of subtracting the price for a commodity purchase or service from the money value of a card owner on a host device 400 on the basis of the information of the card owner read from the IC card 100. The host device 400 judges whether the electronic value possessed by the IC card is less than a preliminarily regulated amount or less, notifies the card terminal device 200 of the deficiency when the electronic value is less than the amount, and the card terminal. device 200 instructs the addition of the electronic value to the IC card 100 so that the electronic value is equal to the preliminarily regulated amount, and also instructs the subtraction of the money value corresponding to the amount from the money value of the card owner on the host computer 400.