Abstract: o make effective use of the limited resources in space stations, the concept of telescience is presented. The various scientific experiments under microgravity environment in space stations need to communicate with ground interactively. The Consultative Committee for Space Data Systems (CCSDS) developed a series of standards for such communication links. This paper emphasizes the discussion on the requirement of communication links by telescience, the model of space data systems suited for telescience experiment, the framework of onboard and ground communication systems.