Based on the total customer experience, adopting the method of analytic hierarchy process, this paper constructs customer satisfaction index(CSI) model, including corporate image, water quality, service quality and complaints of customers, with an index system of A, B, C, D in a hierarchical structure. Applying this model to Zhuzhou Water Limited Liability Company, we reach the conclusion that the company has scored the lowest in watersupply quality(water pressure). Therefore, it’s suggested that the company should accelerate the construction of watersupplynetwork dispatching system, improve network dispatch, and guarantee water pressure. Meanwhile, it has to pay attention to public relation management, and strengthen publicity in order to improve the company’s social image. This model can reflects CSI truly and objectively and help the company to find the deficiency of customer service to achieve a breakthrough in CSI.