Patent ID: 8321920

Claim:
An image forming system, comprising: a server device comprising user information, for performing a user authentication via a computer network and for receiving and adding up count data on a user basis; and an image forming apparatus comprising: a storage unit to which a data area for storing therein the count data including a count value of an occurrence of a predetermined event can be allocated; a login processing unit for determining whether to permit a user to log in; a count unit for updating, when the predetermined event occurs based on an operation performed by the user, the count data for the user; and a transmission unit for transmitting, when the user logs out, the count data for the user to the server device; wherein, the storage unit further comprises a nonvolatile memory, capable of storing the count data and user identification information in association with each other; the data area is secured in the storage unit after the user is permitted to log in, and is released after successful transmission of the count data after the user logs out; when the transmission of the count data fails, the count data is set as unregistered count data; and the unregistered count data is retransmitted when the same user logs out after the next login, and at the time of the next login, if the unregistered count data exists, the unregistered count data is continuously used without the new count data area.