Abstract: Aiming at video service needed by mobile client, this paper proposes a high performance wireless streaming media system based on the 3GP file format. The proposed system adopts AVS_M to compress the video data and stores the compressed data in the server by using the 3GP file format. The system controls the play-back of streaming media by RTSP, describes the multimedia session by SDP, transmitts and commands 3GP streaming media data by RTP/RTCP. Simulation test in NS2 show that this method performs better for the transmission and play-back of streaming media by slowing down the transmission rate without higher buffer requirement.