Abstract: The atmospheric energy budget calculation over west tropical Pacific during the Sino–America Sea–Air Join Investigation has been made. The controlled area is divided into three polygons (east, middle and west areas). Based the data from this investigation during the 9th through 15th of January and 1st to 14th of February, 1986, the horizontal transportation of the atmospheric energy budget is computed day by day. It is pointed that the direction of the atmospheric energy transportation in the west part of west tropical Pacific is from the outer region towards inner region, and it is in an opposite direction in the east and middle parts. It shows that over the west area the warming is obvious during the investigation period. In addition, the regional differents for the local change of atmospheric energy are less than that of the transporting terms