Within half a century, a new branch of mathematics mathematical theory of planning-formed and flourished due to economic urgently required to implement the optimal targets: most, least, the fastest, cheapest, best, . today, the rapid development of electronic computer engineering have made it possible to practice for design automation in many areas. Such as determining the parameters of the optimal building structure standard cheapest price, calculate the tension adjustment of the cable-stayed bridge to the red sphere deviation versus the smallest sphere desired, select size cross-sectional size of structural parts that meet the testing standards and the smallest volume of.