The invention discloses a method, device and system for realizing three-dimensional video communication. According to the method for realizing three-dimensional video communication, a video communication request message is sent to a called terminal, wherein the video communication request information contains first video media information and second video media information; a video communication response message sent by the called terminal is received, wherein the video communication response message contains the first video media information and the second video media information when the called terminal supports three-dimensional video communication; if it is detected that the video communication response message contains the first video media information and the second video media information, polarization processing is conducted on a first video media stream and a second video media stream, and a first path of video information and a second path of video information are generated and sent to the called terminal. Through the negotiation between a calling terminal and the called terminal, three-dimensional video communication can be achieved on an existing two-dimensional videophone terminal.