The ancients thought that man should follow the earth and the earth should follow the sky, so the development of the affairs on the ground can be predicted through the movement and changes of the stars in the sky. In ancient times, China was a country dominated by agriculture, so the weather was a very important factor for the whole country's production. Therefore, the ancients hoped to master the rules of weather operation through the changes of the stars, so they developed stargazing. But stargazing needs people with a certain knowledge base to master it, and then it was integrated into China's mathematical system.

The main significance of stargazing is that it has made great progress in ancient astronomy in China. The ancients also summed up some experiences through observing the stars and celestial phenomena, which prompted China to produce scientists such as Zhang Heng, Guo Shoujing and Monk and his party.

The significance of stargazing in history lies in making calendars and divination. In the 15th and 17th centuries, astronomy became the beginning of physics challenging theocracy. Heliocentrism replaced geocentric theory, saying that scientists paid the price of blood, but brought the flame of civilization to mankind. The discovery of Kepler's three laws paved the way for Newton's law of universal gravitation.

at present and in the future, observing the universe is to know the past and future of the universe (the generation and future evolution direction of the universe) and to find small celestial bodies that may hit the earth.