An image forming system includes: an image forming portion that forms an image on a paper; an image scanning portion that scans the image formed on the paper; and a processor that controls the image forming portion based on a scanned image obtained through scanning of the image scanning portion, in which the processor is configured to: specify, based on a first scanned image that is corresponding to a first image formed on a first paper by the image forming portion and that is obtained through scanning of the image scanning portion, a first deviation amount representing a magnitude of a deviation of the first image with respect to the first paper; specify a first correction amount for deviation correction applied when the first image is formed, based on first management information included in the first scanned image; calculate a second correction amount based on the first deviation amount and the first correction amount; embed second management information representing the second correction amount in a second image; and correct a position where the second image is formed on a second paper, according to the second correction amount.

An image-forming apparatus includes an image-forming unit; a calibration unit configured to execute calibration of the image-forming unit on the basis of a chart image formed by the image-forming unit; a reading unit configured to generate a read image including the chart image by reading, according to at least one reading condition, a sheet on which the chart image is formed while conveying the sheet along a conveyance path; and a control unit configured to determine, on the basis of the read image, whether the sheet has been correctly read by the reading unit. The control unit is configured to output a notification prompting a user to adjust the at least one reading condition in a case where it is determined that the sheet has not been correctly read by the reading unit.