The most scientific sleep time is 6-8 hours a day recommended for adults, 8-10 hours a day for the elderly, 10-12 hours a day for children, and teenagers should make sure they sleep around 10 hours. But the most scientific sleep time. It is recommended to sleep at 22-23 pm every night and get up at 6-7 am, which is the most scientific sleep time phase in line with the biological clock and circadian rhythm of human body. And the scientific sleep time should try to ensure that the deep sleep phase exceeds 4 hours and the light sleep phase should be less than 3 hours. And at 2-3 am, try to fall into a deep sleep at this time, so as to fully relax the nerves of the brain, relieve the usual study and work too much pressure, for the establishment of the body’s immune system has a very good effect.