To reduce an operation performed forcedly in the case of arranging a document image after output by adding a working function for arranging the document image to a composite image forming system.

When the document stacked on a document feeder(RDF) 101 is successively carried to a document platen glass surface 102 one by one, the lamp 103 of a scanner part is lighted and a scanner unit 104 moves to irradiate the document. Reflected light or transmitted light from/through the document radiated to a CCD 109 is photoelectrically transduced there. The transduced electrical signal is transmitted to an image processing part 110. Image processing set by various operation parts is performed in the image processing part 110. The image processing performed in the case of working the image is performed by interlocking the image processing part 110 with an image memory part. In the case of punching the document according as a working mode is set, a hole is made by a punching mechanism through a sorter control part from a core part.