An image processing system can specify storage locations of necessary functions even when a user-set process flow has been updated. The image processing system includes a setting device and an image processing device. The image processing device includes a storage device and a field programmable gate array (FPGA). The setting device includes a generation part that generates storage location information defining a storage location in the storage part for each of image processing programs to be selected, which have been selected from a library, and a transmission part that transmits the image processing programs to be selected, a process flow defining an execution order of the image processing programs, and the storage location information to the image processing device. The image processing device includes a rewriting part that writes a received image processing program to a storage location of the storage device defined in the storage location information.