Green screen technology was first applied in the field of film shooting. Since digital photosensitive equipment is more sensitive to green, shooting against a green screen background will facilitate the production of active masks. Green screen technology can achieve precise separation of foreground and background, which has a very critical value in the production of film special effects. The green screen assistant uses the "digital green screen technology", also known as the chroma key keying technology. In layman's terms, it is a bit like the keying technology in PS, but it happens in the video field, and the technical difficulty is even greater. The green screen technology has entered the live broadcast industry, which has given birth to the innovation and transformation of the live broadcast scene mode. In the past, it was a boring life or work scene, but now it can be a variety of backgrounds such as animation, scenery, and video. The green screen assistant creatively opened the virtual scene live broadcast model. Live broadcasting in virtual scenes is a real model innovation. Technology has created a new experience model and may also lead to changes in the business model of live broadcasting.