After hundreds of years of development, film technology has gone from wild to mature, and filmmakers have created one classic and another visual miracle by using chemical photography. When the time is gradually moving towards the 21st century, chemical photography approaches the critical point, has little room to rise, and is increasingly unable to cope with the demands of the film industry for new technologies and new shooting techniques and ideas. At the same time, digital photography is in the ascendant and is entering the film field where traditional technology is impregnable with unprecedented momentum. From the use of DV in Dogma 95 to the bold application of HD photography by George Lucas, with the politics and discussion of "die-hards" and "reformers", digital photography has eroded the territory of traditional film and gradually become the mainstream of today's film industry. In this process, light distribution, photography, editing and other work have been impacted and affected one after another. This is a completely new revolution, a confident prospect of a future full of possibilities.