A digital camera loaded with a removable memory card storing image files and a print order file, in a wireless mode, sends the files to a computer via a handy phone set, and prepares a directory information file in which the files are virtually positioned in a preselected layer, so that the directory structure of the memory card can be reconstructed. The camera then accesses the handy phone set to send the files to the computer. The computer reconstructs the original directory structure and file names based on the directory information file and then prints out the image data of the image files in accordance with the print order file. The computer produces prints in the same manner as when directly reading the image data from the memory card.