In our study, we used Internet of Things networking technology to monitor the environment of Emperor Qinshihuang’s Mausoleum Site Museum. Compared with the off-line monitoring method, we believe that the Internet of Things technology provides better environmental monitoring for heritage preservation because of its smaller intervention in cultural relics, timely response, manpower-saving and intuitive grasp of the environmental status of different regions. Therefore, it is easy for us to contrast analysis and executive control. Although there are still some problems at this stage, by increasing the data storage capacity, expanding the battery capacity, smoothing out the network, and optimizing the sensor calibration measures, we could still enhance the effectiveness of environmental monitoring and improve environmental precontrol ability for cultural heritage.