The study, "Application of New Technologies in Heritage Sites," takes the status quo of heritage site management as a background, delving into the potential application of new technologies within it, with particular attention to their impact on conservation and development. The central focus of this study is to elevate the visitor experience while preserving historical value. The application of big data in heritage sites is discussed in detail, revealing its pivotal role in deepening understanding of heritage sites and optimizing their management. On that basis, the role of digital twins, as an emerging technology, in supporting conservation and development in heritage sites is thoroughly analysed. While striving to enhance visitor experience, preservation of historical value The application of big data in heritage sites is discussed in detail, revealing its pivotal role in deepening understanding of heritage sites and optimizing their management. On that basis, the role of digital twins, as an emerging technology, in supporting conservation and development in heritage sites is thoroughly analysed. While striving to enhance visitor experience, preservation of historical value remains at the core of this research. Furthermore, this study expounds on the concept of metaverse and its potential application in heritage site management. By offering a multi-dimensional interactive experience, the metaverse portrays the connection between humans and history, cultural heritage more vividly. However, the deployment of these new technologies also faces many difficulties and challenges, which this study addresses and provides solutions to. The comprehensive use of new technologies to manage and protect cultural and historical heritage in a sustainable way can greatly enhance their interpretive value, thereby better transmitting them to future generations and improving the visitor experience. The innovative point of this study lies in providing a unique perspective for heritage management, exploring how modern technologies are applied in heritage management in order to promote the protection of heritage and enhance their interpretive value. In conclusion, this study suggests that new technologies, including big data, digital twins, and the metaverse, play a significant role in the development and conservation of heritage sites, presenting a sustainable method for heritage management. The findings of this study can serve as a reference for scholars in relevant fields, as well as aiding heritage managers in practice to better care for the protection and development of historical heritage, respond to the challenges of emerging technologies, and unleash their potential in heritage management.