Sleep quality monitoring standards, refers to the adoption of polysomnography to stage the sleep structure of the observation object, and to record and analyze the respiration, arterial oxygen saturation, heart rate, and limb movement changes occurring during sleep. 1. Sleep structure: the number of awakenings during normal sleep does not exceed 5 per hour, and the sleep latency time exceeds 10 minutes. In addition, generally stage 1 sleep accounts for 5%~10% of the whole sleep time, stage 2 sleep accounts for 50%, and stage 3~4 sleep accounts for 10%~20%. 2. Breathing: The airflow monitor in polysomnography can detect the length and frequency of breathing. If breathing stops for more than 10 seconds, it means apnea. If the airflow drops more than 50%, it indicates hypopnea. 3. Arterial oxygen saturation: Normal oxygen saturation is 85%~100%. If oxygen saturation is lower than 85%, it indicates moderate or severe hypoxia. 4. Heart rate: Normal people’s heart rate is 60 beats/minute to 100 beats/minute in sleeping state. 5. Limb movement changes: Chest movement monitoring can be performed to determine whether it is obstructive sleep apnea syndrome or central apnea syndrome. When poor sleep quality exists for a long period of time, one should go to a specialized hospital in time to clarify the cause of the disease through sleep quality monitoring and treat it in time.