To provide an image processing system that can improve convenience of a digital camera so as to reduce the communication data quantity.

The image processing system is provided with a parameter decision section that decides (S15) the parameters used for image processing, based on received scene information when a communication section to communicate with the digital camera receives the scene information (S11), a processing management section that generates a processing number in response to the reception of scene information, transmits the processing number from a communication section to the digital camera (S17) and stores the processing number and the decided parameters in cross-reference with each other (S16), an external input output section that reads image data and the processing number stored in cross-reference with a flash memory of the digital camera, and a processing management section that reads the stored parameter in cross-reference with the read processing number.