1. An image display device comprising: a first record medium mount unit and a first record medium driver unit for mounting a first record medium having image information recorded thereon as electronized compressed image data; a second record medium mount unit and a second record medium driver unit for mounting a second record medium having image information recorded thereon as electronized compressed image data; a display unit including first and second display screens; an electronic circuit unit for reading a predetermined amount of record data from said first record medium and said second record medium mounted on said first record medium mount unit and said second record medium mount unit, and supplying said predetermined amount of record data to said display unit; a console unit for determining a display mode and a display form to said display unit of the read data; a portable and foldable book type main body for accommodating said first record medium mount unit, said second record medium unit, said display unit, said electronic circuit unit and said console unit; said console unit having a first and a second screen selection buttons for selecting said first display screen and said second display screen, a first and a second replay button for displaying data stored in said first record medium and said second record medium provided in said first record medium driver unit and said second record medium driver unit on said first display screen and said second display screen, and a dual screen button for displaying data stored in said first record medium and said second record medium provided in said first record medium driver unit and said second record medium driver unit on both of said first display screen and said second display screen; said electronic circuit including a control unit so as to display data stored in said first record medium on said first display screen when said first screen selection button corresponding to said first display screen and provided in said console unit is in an operation, so as to display data stored in said second record medium on said second display screen when said second screen selection button corresponding to said second display screen and provided in said console unit is in an operation, and so as to display either data stored in said first record medium or data stored in said second record medium over said first display screen and said second display screen when said first screen selection button or said second screen selection button and said dual screen button are in an operation; said book-type main body having the first and second display screens of said display unit combined as dual-screen independent display screen and/or dual-screen integral display screen and used as a double door, and said first record medium mount unit and said first record medium driver unit being arranged at one of said double door, and an electronic circuit board constituting said electronic circuit being arranged at the other of said double door; said first display screen being arranged above said first record medium mount unit and said first record medium driver unit, and said second display screen being arranged above said second record medium mount unit and said second record medium driver unit; said book-type main body being opened to exhibit said first display screen and said second display screen when said first display screen and said second display screen are used, said first display screen and said second display screen being disposed in contact or in an adjacent configuration as if said first display screen and said second display screen were one screen, and either data stored in said first record medium or data stored in said second record medium being able to be displayed over both said first display screens and said second display screen in a predetermined size; and said first display screen and said second display screen being folded when said first display screen and said display screen are not used, and being arranged to be portable.