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,　transmits　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.