The emergence of intelligent economy is a subversive change in human society. The current field of education has gradually become a practical field of real-time interaction and integration between virtuality and reality. Digital Twin has the characteristics of virtual and real symbiosis, high virtual simulation, high real-time interaction and deep insight, etc., and its application trend also extends from the industrial field to the field of education. With the revolutionary upgrade of computing efficiency, connection and display technology, the integration of digital world and physical world has been promoted, and the holographic classroom with the morphological characteristics of "visual 3D learning space" has been jointly created. In this paper, the characteristics of digital twin technology are analyzed, and the characteristics and application forms of holographic classroom are discussed. Finally, the application prospect of holographic classroom is given, which is mainly reflected in: sublimating learning space, optimizing distance learning process, helping maker and innovation education, boosting vocational education, promoting scientific management and control of teaching facilities, and improving the level of dynamic evaluation of teaching. The prospective research based on holographic classroom is of great significance to effectively promote the reform and reconstruction of learning space and learning mode under the new technology enabling in the "intelligent +" era.