The course of development is formed and developed in the stage of human society's development to capitalism. It is the initial form of international economic relations and the international exchange of goods. As early as the 14th and 15th centuries, some countries along the Mediterranean coast appeared the bud of capitalism, and international commodity exchanges were more frequent than before. From the 16th century to the middle of the 18th century, with the development of capitalism, great geographical discoveries, colonization and primitive accumulation of capital, international Commodity Exchange developed quite a lot, and the bud of international division of labor appeared. From the mid-18th century to the 1870s, developed countries in Europe and America successively completed industrial revolution. With the establishment of capitalist production mode and the emergence of machine industry, the domestic production and market demand of a country can no longer be satisfied. Some advanced countries urgently need to go overseas to find sales markets, raw materials and sources of living materials. At this time, the development of the transportation industry promoted international economic exchanges. Therefore, the formation of advanced countries to backward countries to sell a large number of industrial products; The natural economy of the backward countries has been gradually broken down and has become a pattern in which advanced countries dump their industrial products and provide raw materials, grain and labor bases. The division of labor and opposition between industry and agriculture within a country began to transform into the international division of labor and opposition between industrial countries based on advanced technology and agricultural countries based on natural conditions worldwide. As countries and regions with different levels of economic development are involved in the scope of international division of labor, through international Commodity Exchange, the economies of all countries begin to form a whole and the world economy takes shape initially.