To save the time and labor to confirm omission of image data recorded on a disklike recording medium.

An order list image for displaying the order numbers of respective orders and the numbers of images while making them to correspond to each other is generated and displayed at a display part. To indicate the processing state of each other, an order whose image data are currently read in is displayed in a 'reception' field R and an order whose image is being compressed into a JPEG image is displayed in a 'write preparation' field T; and an order which is expected to be written to a disklike recording medium is displayed in a 'write wait' field W, an order which is being written to the disklike recording medium is displayed in a 'just writing' field E, and an order whose writing process is completed is displayed in a 'writing history' field H.