Multi-screen interaction refers to the use of Flash protocol, Miracast protocol, etc., through the WIFI network connection, in different multimedia terminals (such as common based on Ios, Android, Symbian and other different operating systems of different smart terminal equipment, such as cell phones, PAD, TV, etc.), can be multimedia (audio, video, picture) content Transmission, parsing, display, control and a series of other operations can be in different platforms and devices at the same time *** enjoy the display of content, enriching the user's multimedia life. Simply put, it means that the screens of several devices can be connected to each other through specialized connection devices. For example, the movie on the phone can be played on the TV, the pictures on the tablet can be shared on the TV, and the content of the computer can be projected onto the TV, which is a technology that is quietly emerging nowadays.