The invention provides a composed type video input and output device comprising a double-sided scanner and a service machine with output functions. The duplex scanner feeds and extracts two-sided image signals on both sides of the hard data media with two image captors. The machine is connected to a double-sided scanner and has a bottom surface, a top surface and a first face and a plurality of second faces connected between the top and bottom surfaces. The first side is facing the user when the user performs the output function of the service machine, and the double-sided scanner is mounted on one of the second sides and is located in the positioning area of the second side. The output function converts the duplex image signal into output data and prints the output data on the print media or to the external device.