Descartes, 1596, was born in Turanla Sea on March 3 1 (now renamed Descartes to commemorate this great man), and died in Stockholm, Sweden on February 3 1 1. Descartes is a famous French philosopher, physicist, mathematician and theologian. He made an important contribution to the development of modern mathematics, because he formulated the geometric coordinate system and was known as the father of analytic geometry. Descartes, the representative of dualism, left a famous saying "I think, therefore I am" (or translated as "thinking is the only definite existence") and put forward the idea of "universal doubt". Descartes was one of the founders of modern European philosophy, and Hegel called him "the father of modern philosophy". His philosophical thoughts deeply influenced later Europeans and opened up the so-called "European rationalism" philosophy. Descartes is a self-contained system, which combines materialism and idealism and has a far-reaching influence in the history of philosophy. At the same time, he is a scientist who dares to explore, and his analytic geometry is of epoch-making significance in the history of mathematics. Descartes is one of the most influential masters in the field of philosophy and science in Europe in the17th century, and is known as "the ancestor of modern science".