In Babylonian times, mathematics and astronomy were the most developed sciences, and decimal and hexadecimal methods were used for counting. The hexadecimal method is used to calculate the degree and timing of the day of the week, which has been used all over the world so far. In the field of algebra, the Babylonians could solve ternary equations. In astronomy, we know how to distinguish stars from planets, and we also name known stars. At that time, the lunar calendar divided a year into 12 months, a day and night into 12 hours and a year into 354 days. In order to adapt to the difference of the earth's revolution, it is well known to set up a leap month. The Babylonians' long-term accumulation in astronomical observation enabled the later Babylonians to predict solar eclipses and planetary collisions, and further calculated that a year is 6: 06, 15, 4 1 second in 365 days, only 26 minutes and 55 seconds more than the modern calculation.