1) The rack construction with the wallboard structure after high-strength holistic processing has great working stability and is durable in use; 2) The 650-line color high-definition camera can reach 70-times amplification ratio, present clear images, possess high resolution ratio, and substantially improve the precision of the plate; 3) The lifting of microscopic camera is controlled by the gear motor for conveniently mounting plate; 4) The complete machine adopts the centralized control of circuits, which is convenient for operations and has relatively high degree of automation; 5) The 19-inch high-resolution liquid crystal display provides clear and bright images and effectively alleviates the visual fatigue of operating workers.