Abstract: The characteristics and limits of the general three models of radiative transfer in the atmosphere are discussed. Numerical tests were carried out by means of both the radiative transfer's law and the transmittances measurements in the real atmosphere. The results show that there are very good agreements between the transmittance measured in the fields and calculated by the model for COIL and HF overtone 20P4 lines, but big error for HF overtone 20P5. Moreover, the significant influence of aerosol types on transmittance of the laser beam through the atmosphere is studied.