To provide a multifunctional automatic vending machine to which counter value to a service and a product can be paid with various kinds of prepaid cards, credit cards or a common prepaid card, and a method for paying the price through the use of this multifunctional automatic vending machine and the common prepaid card.

This system is provided with an automatic vending mechanism constituted so as to execute the sales of a product or providing of a service selected by a selecting button, a reading means 4A for reading the effective balance data of a supplied prepaid card, a data processing means 16 for generating writing data by subtracting the price data of the selected product or service from the read effective balance data, a writing means 4B for writing data in the card by a prescribed format, and an ejecting means 5 for ejecting the written card.