The earth's planetary albedo, outgoing radiation and the radiation balance of the "earth-atmos户ere" system and the atmosphere have been calculated by means of mean serological data at 34 stations over East Asia area for June and December during the period 1957 to 1962. In the estimation, some data from aircraft measurement of cloud have been adopted, and Yamamoto's radiation chart has been used in computing in- frayed radiation flux. From the data obtained, some of the characteristic features of the seasonal changes and regional variations of the radiation balance and its components over East Asia are figured out and discussed together with comparisons of these with the lati-rude means of northern hemisphere.