The chromatograph 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, etc. Modern scientific instruments and equipment are highly integrated with advanced technologies such as mechanics, electricity, optics, computer, materials science, physics, chemistry and biology. They are 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 this subject tends to be intellectualized, miniaturized, integrated and systematic engineering. Its development and application are closely related to the development of modern science and technology in various fields, especially in the fields of biology, medicine, materials, aerospace, environmental protection and national defense, and the employment field is extremely extensive.