Intercomparison between eight radiative transfer codes used for the studies of COMS (Communications, Ocean,fluxes: 1) direct solar irradiance at the surface, 2) diffuse irradiance at the surface, 3) diffuse upward flux at the surface,and 4) difuse upward flux at the top of the atmosphere. The result (hereafter called the H15) from Halthore et al.’s study(2005) which intercompared and averaged 15 codes was used as a benchmark to examine the COMS models. Uncertaintyof the seven COMS models except STREAMER was ±4% with respect to the H15, comparable with ±3% of Halthore etal.’s (2005). The uncertainty increased under a large SZA = 75o. The SBDART model generally agreed with the H15better than the 6S model, but both models in the shortwave infrared region were equally good. The direct solar irradiance(12.1 Wm2). This reason was partially due to diferently installing the wavelength resolution in the flux integration. Thisstudy may be useful for selecting the optimum model in the shortwave region.......... intercomparison, radiative transfer model, Rayleigh atmosphere, SBDART, 6S(. . )