Keynes (1883~ 1946) was born in a scholar's family in Cambridge University, England. He studied at the famous Eton College and Cambridge University, and served as a government official. Later, he became a researcher at the Royal College of Cambridge University and attended the Paris Peace Conference, but he mainly taught economics at Cambridge University all his life. He served as an adviser to the Ministry of Finance during World War II and participated in the preparatory work of the International Monetary Fund and the International Development Bank after the war. He died of a heart attack on 1946. His economic works are famous all over the world. For example, monetary reform theory (1923), monetary theory (1930) and general theory of employment, interest and money (1936).