A color material specifying unit of a digital camera generates color material specification data that specifies a color material to be used when forming an image in a printer. A transmitting unit transmits, to the printer, print instruction data including the color material specification data generated by the color material specifying unit, and image data stored in a storage unit. A receiving unit of the printer receives the image data and the print instruction from the digital camera. A color material specification retrieving unit retrieves the color material specification data from the digital camera. By using the color material specified based on the color material specification data, an image output unit forms the image from the image data received by the receiving unit, and prints the formed image on a recording paper.