Overlay network had received great attention in recent years. Overlay network usually used the peer-to-peer(P2P) networking paradigm for enabling end systems to share their resources. Recent researches had proposed many interesting applications on overlay network such as files sharing and multimedia streaming service. In this paper, we proposed an overlaid p2p network platform to support modern multimedia applications efficiently. This platform so-called OSSP(Overlay Streaming Service Platform) can be exploited for multimedia services include live streaming services, on-demand real-time streaming services, non-real-time transmission services, computation services and data storage services. The architecture of OSSP can be divided into three planes: transmission plane, streamization plane and management plane. With OSSP, we believed that high efficient and networking will be possible.