Dunhuang Mogao Grottoes is a world famous cultural heritage, with high humanistic and artistic value and non‐renewable.Under the concept of sustainability, digital technology offers a possible way to preserve the Dunhuang Mogao Grottoes’ architecture, statues, and murals in the face of increasing ecological damage. Digital technology has had a positive effect on the extension and preservation of Dunhuang culture and art in terms of convenience and efficiency, while also causing erosion and disintegration of the art itself, mainly in the form of a weakening of the symbolic nature of Dunhuang art. Based on Debray's media studies methodology, this paper examines the media ecosystem of Dunhuang digital art, comparing the differences between the media configurations of Dunhuang Mogao Grottoes art and Dunhuang digital art, and combining research with an analysis of three aspects of Dunhuang digital art: the value system, the subject of power and the carrier of communication. While affirming digital art, this paper offers insights and perspectives on the healthy development of the digital art industry based on the symbolic diminution of Dunhuang culture and art brought about by digital technology.