Site monitoring plays an important role in scientific research and engineering fields. Improving the information level and practical level by applying new technology in site monitoring is currently a research hotspot. In this research, UAV (unmanned aerial vehicle) panoramic technology is applied to site monitoring to build a 3D virtual reality environment, which is integrated with monitor sensors to form a 3D panoramic site-monitoring platform using computer networks. On this platform, the 3D real-time monitoring is implemented and the user experience of site monitoring system is enhanced, which demonstrates the potential of UAV panoramic technology in site monitoring.