Abstract: Based on the marine and meteorological data collected by the vessel "xiang-yang-hong No.14,China" for the first PRC-US joint investigation on ocean and atmosphere over the West Pacific Ocean and other observations from meteorological stations,some physical characteristics,horizontal transfer,local change terms of moist static energy,atmospheric diabatic terms and interchange terms of air-sea,on West Tropical Pacific,which has been divided into three parts named east,middle and west areas,respectively,have been calculated in this paper.It has been point out that there was a energy sink of the horizontal transfer in the atmosphere over the west area,but other areas are invertion.Meantime,the heat sources of atmosphere and sea surface appear on all three areas.Among them,the west area is shown as an intenser heat source.By mentioned above,the distribution of energy budget on the West Tropical Pacific is not even.?Jspecially,the west area is a stronger storage-region of heat and energy during the expedition period.