There is provided is an image processing system including an image processing device, which receives an image formation instruction containing information on a formation target image and output destination designation information designating an output destination of the image formation instruction, which are output by an image forming device control program, transmits the image formation instruction to an image forming device associated with the output destination designation information, and produces, when the image formation instruction is transmitted to the image forming device, a log image corresponding to the formation target image based on the image formation instruction.