Screen projection method, device and system

The invention discloses a screen projection method. The method comprises the following steps that a sending terminal collects screen information of the sending terminal, records and encodes the screeninformation, fluidizes the screen information into a streaming media stream, and sends the streaming media stream to a server in a wireless communication manner, then the server sends the streaming media stream to a display terminal in a wired or wireless communication manner, and the display terminal restores the received streaming media stream into screen information to display. The whole network communication process is realized through software and the method can be performed on a server of any existing service, so that the development cost is lowered remarkably; the method can break thelimitation of the local area network so as to be used in the public network, thereby being used in a larger scope; the server is much powerful than common screen projection hardware devices in calculation and can be configured