Integrated energy system has the characteristics of improving energy efficiency and being environmentally friendly. It has been developed rapidly in recent years, but it lacks technical and economic benefit analysis methods in its promotion process,and lacks typical representative reference cases. In order to solve the above -mentioned problems, a set of integrated energy system combining electric heat storage technology with wind power and photovoltaic is designed for knitting industry, and the benefits obtained after it is applied to the factory is analyzed. Finally, the electric heat storage technology is prospected. The results play an important role in promoting the application of electric heat storage technology and increasing the electrification rate of the terminal.