The coordinated development of heritage protection and tourism is the goal of both cultural heritage sites and sustainable heritage tourism. However, the development of sustainable heritage tourism can be restricted due to insufficient resources for heritage tourism marketing as well as insufficient cultural heritage protection measures. This study uses digital methods such as oblique photography, 3D laser scanning technology and panoramic technology to digitize the cultural landscape heritage site. Using these methods, we build a virtual tourism subsystem to improve tourists’ experience of cultural heritage tourism resources and enhance the attraction of cultural heritage tourism. In addition, we build a tourist flow and environmental monitoring and management subsystem based on the Internet of Things technology. This subsystem can help managers adjust and regulate tourist flow according to the tourism carrying capacity threshold. We also conduct an ecological environment health assessment and management simulation according to the “Pressure-Status- Response” model, in doing so, we aim to enhance the protection of cultural heritage sites. Finally, we develop a comprehensive platform to integrate tourism marketing and heritage protection management functions. The results of this study provide a new approach for the coordination of and symbiosis between the protection of cultural heritage and tourism activity.