Thales, the earliest mathematician in Greece, proposed and proved several basic propositions of geometry. Pythagoras and his school made great contributions to mathematics and proved Pythagoras theorem. It is said that many theorems about parallel lines, triangles, polygons, circles, spheres and regular polyhedrons in Euclidean geometry are actually their achievements. In the late ancient Greece, mathematics made great achievements. Mathematician Euclid wrote Elements of Geometry, which systematically sorted out the mathematical achievements of predecessors and collected the great achievements of geometry at that time. Archimedes left many mathematical works, the most famous of which are the Star Map and Sphere and Cylinder, which are considered as the pinnacle of ancient Greek mathematics. In physics and mechanics, he put forward the lever principle and Archimedes principle and became the creator of statics. Aristotle was the first person to study physical phenomena seriously. Physics is the earliest monograph on physics in the world, which mainly studies mechanical problems.