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.