A digital copying machine comprising an image scanner part for reading an
original image to reproduce image data of the original image, a laser
printer part for printing an image according to given image data, a
removable memory card, and a reader/writer of the memory card is
provided. For offline print, the image data of a document prepared in an
external computer and output control data are stored into the memory
card. By installing this memory card in the digital copying machine, the
digital copying machine prints the image data read out from the memory
card offline in a desired output form. For offline image input, read
control data obtained by using an image scanner such as a read gradation
level, a read size, density, and the degree of edge enhancement is stored
in the removable memory card using software executed in an external
computer. By installing this storage medium in the digital copying
machine and setting an original to be read in the digital copying
machine, the original image is read according to the read control data
stored in the memory card, and the obtained image data is stored into the
memory card.