Susan Langer said that the architect created its image: a tangible human environment, which shows the functional style of a certain rhythm that constitutes a certain culture. This style is the alternation of sleeping and waking up, adventure and safety, encouragement and relief, restraint and laissez-faire; Is the speed of development, is a calm or ups and downs of life process; It is a simple form in childhood and a complex form when the moral realm is full, which marks the alternation of the sacred and unpredictable tone of social order. If "man was created in the image and will of God" in the Middle Ages, then in the Renaissance, humanists put forward the motto of the ancient Greek philosopher Protagoras again. "Man is the measure of all things". The Greeks believed that the body, limbs and the whole of men and women with aesthetic feeling had the above-mentioned beautiful proportional relationship. Vitruvius, an ancient Roman, believed that the perfect proportion of human body should be that the width of both hands is equal to the height, forming a square, and both hands and feet can stand on the circumference with the navel as the center. Because square and perfect circle are perfect shapes, this human body is perfect. Leonardo da Vinci, a Renaissance master, described this idea of Vitruwei in his notebook. In this sense, the original cosmic figure of "the sky is round and the place is round" is also a human figure, which is the real essence of the humanistic spirit embodied in the Renaissance.