As early as 1977, George Lucas showed us the advanced technologies in the vast universe through "Star Wars", including laser swords, R2D2, spaceships, and ever-present 3D projections Communication machine. In the movie, the Jedi can have holographic video calls with others simply through a compass-sized device; in "Avatar" decades later, 3D holographic projection technology has become more realistic, More details and annotations can be clearly displayed, a bit like augmented reality. In fact, this kind of holographic imaging technology is not difficult to see in various science fiction movies, and there are also many real-life application examples.