Mainly from the viewpoint of power generation planning, measures for the wide-region environmental preservation were studied through surveying and analyzing the supply and demand trend of energy and power in the Asia-Pacific region. In that region, the demand is quantitatively large in China, India and Japan, while its growth rate is very high in the developing countries and new industrial countries. Particularly, the power demand surpasses the energy demand in growth rate with progress remarkably made in electrification. As for the composition of generated power, the oil burning power generation is being prevailingly developed in most of the countries. Taking the situation of each country into consideration, the feasibility was studied, from the viewpoint of power generation planning, of taking the anti-CO2 and other measures for the wide-region environmental preservation. As a result, what is promising is the rise in energy efficiency for the short term, and development of gas energy, recyclable energy and nuclear energy for the long term. However because of complicated diversity in energy situation of each country, the international consensus is difficult to reach for the wide-region environmental issue. 22 refs., 14 figs., 14 tabs.