The equilibrium terrestrial temperature is determined by the balance of absorption of the solar irradaince and emission of terrestrial radiation (Earth Radiation Budget). These radaitive processes are influenced by cloud , aerosol, and absorbing minor constituent gases. In the 3rd Laboratory of Climate Department, the effect of these materials on the Earth Radiation Budget and the interaction between the climate system and the radiative process are investigated by analyzing the ground-based and aircraft observation data.