An image forming system comprising: image forming means configured to form an image on a sheet; reading means (52a; 52b) provided downstream with respect to the image forming means in a conveyance direction in which the sheet is conveyed, the reading means being configured to read an image on the sheet conveyed from the image forming means; and processing means (201; 301) configured to: generate image data representing a result of the reading means reading an image on the sheet, characterized in that the processing means (201; 301) is configured to: set a level of an image editing process applied to the image data, and execute inspection processing to, on the basis of an inspection level, inspect a degree of match between an image corresponding to reference data and an image corresponding to the image data to which the image editing process has been applied, the reference data being image data corresponding to an inspection reference used in the inspection processing and the inspection level being set by the processing means; wherein the processing means (201; 301) is configured to execute the inspection processing with the level of the image editing process being a first level and the inspection level being a first inspection level and to not execute the inspection processing with the level of the image editing process being the first level and the inspection level being a second inspection level greater than the first inspection level; and wherein the processing means (201; 301) is configured to execute the inspection processing with the level of the image editing process being a second level greater than the first level and the inspection level being the first inspection level and to not execute the inspection processing with the level of the image editing process being the second level and the inspection level being the second inspection level. image forming means configured to form an image on a sheet; reading means (52a; 52b) provided downstream with respect to the image forming means in a conveyance direction in which the sheet is conveyed, the reading means being configured to read an image on the sheet conveyed from the image forming means; and processing means (201; 301) configured to: generate image data representing a result of the reading means reading an image on the sheet, characterized in that the processing means (201; 301) is configured to: set a level of an image editing process applied to the image data, and execute inspection processing to, on the basis of an inspection level, inspect a degree of match between an image corresponding to reference data and an image corresponding to the image data to which the image editing process has been applied, the reference data being image data corresponding to an inspection reference used in the inspection processing and the inspection level being set by the processing means; set a level of an image editing process applied to the image data, and execute inspection processing to, on the basis of an inspection level, inspect a degree of match between an image corresponding to reference data and an image corresponding to the image data to which the image editing process has been applied, the reference data being image data corresponding to an inspection reference used in the inspection processing and the inspection level being set by the processing means; wherein the processing means (201; 301) is configured to execute the inspection processing with the level of the image editing process being a first level and the inspection level being a first inspection level and to not execute the inspection processing with the level of the image editing process being the first level and the inspection level being a second inspection level greater than the first inspection level; and wherein the processing means (201; 301) is configured to execute the inspection processing with the level of the image editing process being a second level greater than the first level and the inspection level being the first inspection level and to not execute the inspection processing with the level of the image editing process being the second level and the inspection level being the second inspection level.