(A video conference refers to a video conference held between users in two or more locations using a video conferencing system and a communication network. Real-time transmission of sound and images between the venues can also be added. Still images, files, data and other signals can also be transmitted. Those who participate in the video conference can express their opinions through the TV, observe the image, movements, expressions, etc. of the other party at the same time, and can show the real-life TV images of objects, drawings, documents, etc., or display the words and diagrams written on the electronic whiteboard, etc. , so that people who participate in the meeting in different places feel like a face-to-face meeting in a conference room, which can replace the on-site meeting in effect. The video conference room is different from the ordinary conference room. It is not only a meeting place, but also a place to place the video conference system equipment. The photography installation used in the conference room, the lighting of the venue and the color background have a great impact on the quality of the video image. Therefore, the interior decoration design of the conference room and the design and purchase of the conference room lighting system, sound system, display system, etc. will directly affect the effect of the video conference, thereby affecting the effect and efficiency of the meeting.)