Underground wastewater treatment plant can realize pollution control and provide green land above ground, gradually becoming the main type of wastewater treatment plant in the urban center. As the largest and most standardized underground wastewater treatment plant in downtown Shanghai, Taihe Wastewater Treatment Plant faces with a series of challenges in terms of environmentally compatible intensive design, efficient energy saving and consumption reduction, and automatic control improvement. This project takes BIM technology as an important method of project promotion, explores the BIM technology application framework applicable to all underground wastewater treatment plants, and realizes high-quality design and construction of the project through the application of BIM technology. At the same time, this project combines a variety of BIM+implementations to realize innovative intelligent operation and maintenance, which can provide reference for super-large underground intelligent wastewater treatment plant construction in the future.