The EPCO(Engineering Procurement Construction,Operation)adopted in the water pollution treatment project being implemented in Zhongshan City is to integrate the design stage,procurement stage,construction stage and operation stage into one project under the responsibility of a project company(general contractor),and the construction unit is responsible for decision-making and investment.This paper introduces the operating procedures,integrated management and other characteristics of the EPCO,analyzes its application process in the treatment project in Zhongshan City,summarizes its advantages and limitations,and serves as a reference for the management of similar water environmental remediation projects.