A target image to be retrieved and a processing mode of the target image are stored in a magneto-optic disk as a job in a job file by using a computer which is independent of an image processing apparatus. The magneto-optic disk is set into the image processing apparatus. When the magneto-optic disk is set, whether or not the job file is stored in the disk is detected. When the job file is stored, whether or not a job including a processing mode which cannot be executed by the image processing apparatus exists in the job file is discriminated. When a job cannot be executed, such fact is displayed and execution of the job is skipped.