Due to the limited resources in thin-clients on mobile devices and the large amount of computation for decoding streaming media, it is not easy to support the QoS of streaming media for thin-client on mobile environment. To solve the problems, the terminal servers would be charged for decoding the streaming media and thin-clients have a role to update only the changed areas in their screen. In this paper, an intelligent media player is proposed to provide the improved QoS for streaming media in thin-client computing. Since the proposed method reflects the intrinsic property of streaming media, it provides both the enhanced video quality and the audio streaming fully synchronized with image frames.