Abstract: In the context of digital transformation and intelligent development in nuclear power plant construction, the demand for smart project implementation in the engineering construction field is increasingly growing. This paper presents the application practice of a smart construction site platform in the construction of a nuclear power station. Utilizing key technologies such as 5G+MEC wireless network technology, edge computing, Beidou+bluetooth positioning, video surveillance, and AI intelligent analysis, the smart construction site platform achieves full coverage of 5G wireless networks and real-time video monitoring in the construction area. The platform’s main functions include AI-based real-time analysis and early warning for engineering safety supervision, real-time positioning and alerting of personnel and vehicles at the construction site, integration with the site’s broadcasting system, real-time environmental monitoring, and access control and real-time management of personnel on site. The platform enhances the rapid response and handling of emergencies, transforming passive management into proactive intelligent management, effectively improving the level and efficiency of site management.