In an image processing system an information processor is connected to an image processor. When the image processor detects that a job is completed, the image processor transmits to an image processor that indicates the job information notifying in accordance with a first or second communications protocol that the job is completed. The information processor converts in a predetermined format the information transmitted in accordance with the first communications protocol to notify that a job is completed. Furthermore, the information processor also converts in the predetermined format the information transmitted in accordance with the second communications protocol to notify that a job is completed. The information processor then displays the converted information collectively.