Abstract: Guangyang Island in Chongqing is the largest “mid-river green island”and a rare “ecological treasure island” in the upper reaches of the Yangtze River. Following the requirements of the important instructions of Xi Jinping for Chongqing and the guidelines of “transforming from excessive development to well-coordinated ecological conservation”, Guangyang Island ecological restoration project adopts the EPC innovation mode led by design and, centering around the theory, method and practice of optimal value life community, forms through exploration the “4565” EPC green ecological management system: fourend coordination of “owner end, design end, engineering management end and construction end”, “five-generalness integration” of “general responsibility for the project, general leading by design, general management of construction,general coordination of effects and general cooperation on site”, six-core comanagement of “progress plan, on-site management, cost fabrication, quality management, effect control and safety management” and five-pronged progression of “framework, process, system, informatization and weak area”.This system can give full play to the technical advantages of leading by design,make it possible to lead construction by design while ensuring whole-process control on site, and have on-site progress adjustments timely fed back and incorporated into design results, which can adapt to the complexity and improve the efficiency of ecological restoration projects, thus achieving such ecological restoration objectives as low-investment construction, low-cost operation and maintenance, high-benefit return, high-quality development and high-quality life.