An image output command method, in an image processing system comprising an input controller to dot and compress density or tone data for an image read out by an input unit and for temporarily staying the compressed image data at a buffer; a work station to picture-edit not only a code information edited by an editing input unit but also the image data by the use of an input operating means and a display means; a file server connected to the input controller and the work station by bus lines and for storing the image data, code information and edited data picture-edited by the work station in the file server; and an image setter for reading out the edited data stored in the file server and subjecting the edited data to a required data processing, which comprises the steps of: reading out the stored data from the file server, separating respective image data which constitute one page and commands which edit respective images when the images are transferred to the image output unit via the image setter and are outputted, and separating the data of a unit of one page to blocks and sub-blocks thereby to control image portions by output position and processing method.