1, different meanings. Plotter is a device that can automatically draw graphics according to people's requirements. It can be computer output information in the form of graphic output. Scanner (scanner) is a device to capture the image, as an opto-mechanical integration of computer peripherals, scanner is the third largest computer input device after the mouse and keyboard.
2, different functions. Scanner can be converted to computer images can be displayed, edited, stored and output digital format, is a very strong input device. Plotter can draw a variety of management charts and statistical charts, geodetic maps, architectural design drawings, circuit wiring diagrams, a variety of mechanical drawings and computer-aided design drawings.