In order to solve the uav aerial video realtime transmission, anytime, anywhere viewing problems, in this paper, a new uav video broadcast system based on streaming media server RED5 design solutions. This paper studies the streaming media technology, the RTMP protocol, RED5 streaming media server, H264 video format. Realization of uav aerial collected with x264 video encoding module through the 3G/4G to the streaming media server, the client request, the realtime live or on demand function, through the Web server to save the information such as video, video information management functions. The experimental results show that the system under the condition of existing network fluid has good stability, the design is feasible, practical and reliable system.