本文主要论述了视频会议系统的关键技术和视频会议系统的应用前景。通过对TCP协议和UDP协议的比较,选择不可靠传输协议UDP实现多媒体在网络上实时传输。采用了RTP和RTCP协议提出了“基于UDP协议的RTP实时视、音频传输”的设计思想,通过RTP/RTCP封包/解包的设计实现对网络的流量控制,并同时给出了RTP/RTCP组帧的流程。 This article mainly discusses the key technology of video conference system and the application foreground of video conference system. Through the comparison of TCP protocol and UDP protocol, select the unreliable transport protocol UDP to achieve real-time multimedia transmission on the network. Adopting RTP and RTCP protocol, we put forward the design idea of ​​“RTP real-time video and audio transmission based on UDP protocol”, and control the network traffic through the design of RTP / RTCP packet / unpack. At the same time, RTCP framing process.