In the context of classroom revolution promoting the transformation of smart teaching environment, to solve the problems of small number of classrooms, few seats, complex equipment operation, and high management difficulty in existing smart classrooms. Based on the concept of intelligent teaching, new technologies such as high-speed networks and intelligent cloud boxes are applied to conduct practical research on the intelligent upgrading and transformation of ordinary multimedia classrooms in universities. On the base of not changing the original equipment, tables, and chairs in the classroom, utilizing the existing teaching resources of the school, adding intelligent teaching functions such as multi-channel projection, multi windows, and live streaming. Since the outbreak of the epidemic, the information technology capabilities of teachers and students and the transformation of teaching methods have greatly improved, promoting the process of intelligent classroom upgrading and transformation, and laying a good foundation for the transformation of more advanced smart classrooms.