The work aims to explore the strategy of improving the design quality of public facilities in old industrial areas by constructing an evaluation system for the application of public facilities in old industrial areas, finding the important influencing indexes in the design, and restoring the unique industrial style of old industrial areas, so as to attract people to experience and promote the regional economic development. With Enshi Street as the research sample, in-depth interviews, level-by-level summarization of original data, and decoding analysis are conducted through the rooting theory to find out the evaluation indexes affecting the design quality of public facilities in the old industrial area. A design evaluation model containing four value criteria and twelve indexes is established through hierarchical analysis method. And then the weights of the evaluation indexes are derived through calculations and consistency tests and an impact ranking is made. Finally, a strategy for improving the design quality of public facilities in old industrial areas is proposed. In conclusion, the design evaluation model based on the rooting theory and hierarchical analysis can help to improve the design quality of public facilities in old industrial areas, and the public facilities in old industrial areas can be designed according to the design strategy of basic points and highlights in the future.