Sleep is one of the most important things in life, and about 1/3 of human life is spent in sleep. Good sleep quality is an important factor to ensure the physical and mental health of human body. Everyone has experienced insomnia to a greater or lesser extent in his or her life. With the accelerated pace of society and the improvement of civilization, the number of people suffering from insomnia is increasing, and many patients suffer from insomnia for many years, which seriously affects their work, study and life, and some of them even embarked on the tragic road of suicide, which brings a heavy burden to the family and society. However, most doctors and patients do not have enough knowledge about this, so many patients do not get timely diagnosis and treatment. [Sleep Disorders] Sleep disorders are changes in the quality, quantity, or timing of sleep due to emotional factors, i.e. insomnia, drowsiness, and sleep-wake rhythm disorders; sleep abnormalities refer to abnormal episodic events during sleep. In childhood it is mainly related to children’s growth and development, in adults it is mainly psychogenic. The main ones are sleep walking disorder, night terrors and nightmares. Sleep disorders are often one of the symptoms of another mental disorder or physical illness. [Sleep Time Requirement] – Normally, the length of sleep time cannot be the most important criterion for judging the severity of insomnia 1, infants from birth to the age of one year need the longest sleep time, about 16 hours per day; 2, toddlers from 1 to 4 years old need 12 hours of sleep at night, and sometimes they need 2-3 hours of sleep during the daytime; 3, children from 5 to Children aged 10 need 10~12 hours of sleep per night; 4, children aged 10~12 need 8~10 hours of sleep per night; 5, teenagers usually need 8 hours of sleep per day; 6, 31~60 years old adults, men need about 6.5 hours, women need 7.5 hours of sleep; 7, 60 years old and above, there are 5.5~7 hours of sleep at night enough, such as daytime about half an hour of nap is better. It is better if they have a nap of about half an hour during the day. Note: The quality of sleep of the elderly declines, the deep sleep time in their NREM sleep decreases, and most people’s stage IV deep sleep has almost disappeared. There are more reasons for this, such as sleep structure disorders (decreased deep sleep) is only one of them, and there are also effects such as increased nocturia, chronic pain, and so on. [Relative judgment criteria for falling asleep] 1. No movement; 2. Fixed position; 3. Diminished response to stimuli; 4. Reversibility (easy awakening from sleep)