A maintenance system includes an image forming apparatus that performs image formation by a setting depending on the replacement part using a replaceably configured replacement part and a portable terminal that performs near field communication with the portable terminal. The portable terminal includes an image reading part that reads part information of the replacement part from a printed part affixed to the replacement part and a near filed communication part that transmits the part information read by the image reading part via the near filed communication. The image forming apparatus includes a non-contact IC tag in which the part information is written based on power generated from the near filed communication and an reflection processing part that reads the part information from the IC tag at the time of power on and reflects the part information in the setting.