Astronomical telescopes are the main tools for observing celestial bodies and capturing celestial information. Since Galileo Galilei made the first telescope in 1609, telescopes have continued to develop, from optical band to full band, from ground to space, telescope observation capabilities are getting stronger and stronger, and more and more celestial information can be captured. Human beings have telescopes in the electromagnetic band, neutrinos, gravitational waves, cosmic rays and so on.