Abstract: The phenomenon of that range of thickness of quenched and cold-compressed 7050 aluminum alloy tested by using ultrasonic, which was larger than their actual range, was introduced. The contour map of ultrasonic velocity of the specimen was drawn. Then contour map and range of ultrasonic velocity of a specimen with different heat treatment conditions and a specimen befor and after wire cutting was drawn.The results show that the larger range of quenched and cold-compressed specimen tested by using ultrasonic is resulted from variation of ultrasonic velocity. The contour map of ultrasonic velocity of the specimen is similar to their residual stress field. Contour map of ultrasonic velocity of specimens in different heat treatment conditions is similar to the evaluation rule of residual stress. Variation of contour map before and after wire cutting is coincident with rebalance of residual stress field particularly. Contour map is proved to show integral residual stress in a certain extent. Based on self-balancing feature of residual, a qualitative and quantitative analytical method of integral residual stress in aluminum alloy by using contour map and range of ultrasonic velocity is suggested.