The color difference instrument mainly studies modern precision instruments and intelligent and micro electromechanical systems, including measurement and control technology, micro system theory and application, intelligent structure system and technology, error theory, signal analysis and data processing. Modern scientific instruments and equipment are highly integrated with advanced technologies such as machinery, electricity, light, computer, material science, physics, chemistry and biology. It is not only the premise of knowledge innovation and technological innovation, but also one of the main contents of innovation research. At present, the development of technology in this discipline tends to be intelligent, miniaturized, integrated and system engineering. Its development and application are closely related to the development of various fields of modern science and technology, especially in the fields of biology, medicine, materials, aerospace, environmental protection and national defense, and the field of employment is extremely extensive.