In 2017, the Hong Kong Palace Museum project was officially launched, and in November 2020, its main structure was capped. During project construction, COHL comprehensively applied BIM technology and established a three-dimensional virtual model for the project. BIM technology guided whole-process management of the project, covering design and drawing generation, simulated production and construction, simulated progress of the project, construction inspection, etc. A cloud-based smart construction site platform integrating 50 surveillance cameras as well as 70 IoT sensors and AI analysis applications was created to realize real-time monitoring of eight environmental indicators, such as PM2.5, PM10, noise, and temperature with the support of the latest IoT technology. Moreover, there was an optical fiber real-time monitoring system to monitor the safety of important structures, an AI monitoring system to monitor fire alarms and dangerous behaviors of workers, and a 3D laser scanning system to record all complex conditions at the project site. All of them formed a model of the completed project and enabled checks of structural defects, contributing to the smart construction of the Hong Kong Palace Museum.