To provide an image forming apparatus management system capable of switching a post adjustment system of storing a log in a management device, and a prepaid system, by information recorded in a card.

In the image forming apparatus management system composed of an image forming apparatus 1 for forming images in a recording medium and the management device 2 connected to the image forming apparatus for managing the image forming operation of the image forming apparatus and a value for image formation output, the management device can select the post adjustment system of storing the log for storing the information of the image formation output performed in the image forming apparatus in a storage means, and the prepaid system of collecting the value of the image formation output performed in the image forming apparatus, from the information of an adjustment system recorded in the card.