In a reading apparatus, mask data of entry box lines thicker than lines of a layout printed on a form is stored in a storage portion of a reading apparatus, a layout code printed in the vicinity of the entry box of the layout read by a reading portion is read, and with detection marks as a reference, the mask data corresponding to the layout and the image data read by the reading portion are superimposed for deletion, thereby detecting only the entered data. Then, the detected data is transmitted to a printing apparatus, a client terminal or the like. When data printing is performed, the layout data of a layout management apparatus and the detected data are superimposed and printed by the printing apparatus.