As a carrier, architecture presents diversity. New media art integrates architecture into new ideas to form new communication ways and art forms. The charm of architectural projection is that it can refresh the concept of space, realize spatial augmented reality on the surface of the wall, overturn people's inherent concept of space, project on the building, and create a unique scene completely different from the previous buildings with an accurate reflection. At the same time, it can also combine architectural projection with urban cultural life. The use of digital technology to transform the existing architecture and space into a cultural structure or form, activate the urban public space, not only help the city lighting, but also give life to the architecture, make the dull night become more interactive, and gradually form a new urban label.