“In the context of the transformation and upgrading of the construction industry, a digital twin based intelligent operation and maintenance theoretical system and implementation method have been proposed to address issues such as low management efficiency in the operation and maintenance process of large buildings, insufficient accuracy in decision-making and analysis of various operation and maintenance events, and the need to improve the level of intelligence. By integrating intelligent perception and digital twin technology, an intelligent operation and maintenance architecture system for large buildings and a multi-dimensional and multi-scale twin model have been established, providing an effective solution for improving the intelligence level of operation and maintenance management.”