Patent ID: 7493275

Claim:
An accounting system including an accounting center and a terminal device for communicating with the accounting center, comprising: a first memory built in the terminal device and configured to store accounting point information; a second memory included in the terminal device and configured to store information received from an external source external to the terminal device; a first controller included in the terminal device and configured to update the accounting point information stored in the first memory and to update attributes of the received information when the received information is stored in the second memory, wherein when the received information is stored into the second memory the first controller reduces the accounting point information stored in the first memory and updates the attributes of the received information from an unavailable state to an available state; and a second controller included in the terminal device and configured to transmit the remaining accounting point information stored in the first memory to the accounting center and to set the remaining accounting point information to an initial value based on an accounting processing status received by the terminal device from the accounting center corresponding to the remaining accounting point information, wherein the accounting center performs an accounting process based on the remaining accounting point information transmitted from the terminal device.