The utility model discloses a display instrument automatic identification system based on an image processing technology, which is characterized in that the automatic identification system comprises acalibration standard device and a PC (Personal Computer), and the calibration standard device comprises a bracket, a slide rail, two industrial cameras, two light source pieces, two camera racks andtwo instrument racks. According to the automatic identification system, the industrial camera is controlled by the PC to shoot display data of the standard meter and the tested meter at the same time;interference of human factors in a traditional method is effectively reduced, interpretation accuracy of the digital high-voltage meter is greatly improved, instrument data are stored in an image mode and can be called and checked at any time subsequently, and authenticity and objectivity of the data are effectively guaranteed. Meanwhile, the automatic identification system provides a novel calibration standard device for the control method, and is reasonable in structural planning, convenient to operate, easy to realize, suitable for various fields and suitable for popularization and application.