Aimed at the deep-water jacket platform in the South China Sea, the key technologies of the design of the health management system are systematically expounded and deeply studied, the general idea and specific technical route suitable for the deep-water jacket platform are proposed, and the design and development scheme of the integrated monitoring subsystem and digital twin subsystem is expounded. The study provides more effective methods and tools for the operation and maintenance of deep-water jacket platforms in the South China Sea, which will help improve the safety, reliability and sustainability of the offshore oil and gas production.