Abstract:In modern society, science and technology develop rapidly. In the industrial industry，the automation system is widely used to replace traditional labor with automation technology and equipment，which effectively improves the production efficiency and safety factor. In industrial production and daily life，the frequency control technology is more common，which provides more convenience for the public. In this paper, taking the technical transformation of special crane for copper electrolysis as an example, the application of the technology in the industrial automation system is analyzed, and the development trend of the technology is prospected,so as to better guide the industrial practice.