To facilitate the use by a purchaser and data management by a vendor by interpreting data from facsimile equipment and a computer and sending data answering to the request to external facsimile equipment and a computer through a transmitting and receiving means.

A request processing means 6 interprets data selected as data from the computer of a purchaser among received data and data which are converted by a mark identifying means 5 and represents a request item from the purchaser and answers to the request. The answer is composed of data on a document to be sent to the facsimile II of the purchaser, article catalog data 9 common to screen data displayed on the display device of the computer III of the purchaser, and order sheet data 10. The purchaser receives the answer from the automatic order system I in the form of a printed article catalog copy 12 when the facsimile transmitter II is used or in the form of a display of an article catalog screen 14 and an order screen 15 on the display device when the computer III is used.