Although Korea is short of capital. technology, and natural resources, she has achieved an outstanding progress by the export-drive policies by Korean government and the creative endeavor of Korean firms. As a result of that, Korean economy and enterprises are in the same file of newly industrialized countries and Korea is ready for an economic take-off as a developed country.  But in the early 1980s, each country strengthens protective trade theory and resources nationalism. and this has a great influence on the field of international trade environment. In spite of that, to continue the same high development as that of the past, Korea must try to secure and find export markets, solve trade barriers, make sure of the long-term security of resources. develop technology, and strengthen economic cooperations.  To satisfy these desires by 2000s, we must try to make Korean enterprises have the global competitive power and them grow strongly among world wide firms through capital and technology accumulated during the passed years, and to do so, there must be a foreign production and marketing management. too, this can be achieved only through foreign overseas direct investment. This investment has various forms, to say, verifical integrated, horizontal integrated, conglomerate integrated forms, and the amount of investment in each country from 18 century to today reaches 500 billion dollars.  This investment is done by strategic, behavioral economic, and financial motives. So I am going to approach the fields of like these ; in spite of the differences among political. economical caltural, and social systems, and many risk compared with domestic enterprises, why do Korean firms witsh to transfer the productive facilities to overseas countries and run them there? What is the comparative advantage of foreign direct investment compared with domestic investment?, why is the factor of comparative advantage transferred through foreign direct investment?, what is the motive of foreign overseas direct investment ?, and last the ownership-specific factors and the theory of internalization, and the location specific factors were analysed chiefly. But in consideration of the given condition in Korea, Korean overseas direct investment must be propelled rationally on the basis of the above mentioned theory.