The invention discloses a document projection method, terminal equipment and system. The document projection method is applied to the first terminal equipment, and comprises the following steps: establishing a wireless display WiFi Display connection channel with the second terminal equipment, and sending the WiFi Display media data stream to the second terminal equipment through the established WiFi Display connection channel so as to perform screen projection; after starting a document projection mode and opening the document, stopping sending the WiFi Display media data stream to the second terminal equipment through the WiFi Display connection channel; and sending the opened document to the second terminal equipment through a first connection channel so as to perform the document projection, wherein the first connection channel is the WiFi Display connection channel, or other wireless connection channel. By use of the technical scheme disclosed by the invention, the screen projection is stopped after the document projection mode is started and the document is opened, the media data transmission is reduced, only the document projection is performed, and the user experience is improved.