This paper describes briefly the sounding capabilities of TOVS/ATOVS onboard the NOAA polar-orbiting meteorological satellites, followed by a more detailed review of the retrieval schemes. The ICI physical retrieval scheme with some adaptations is implemented in our experiment. The analyses of the Chinese regional NWP model are utilized to create a rolling library of initial guess field. Retrieval results validated against both NWP analyses and radiosondes indicate good agreement between ICI retrievals and conventional observations. Preliminary result from the PC-ATOVS Windows display system of NSMC will also be shown.