The methods of determining narcolepsy are as follows: 1, clinical manifestations, it has an uncontrollable, special desire to sleep, if the time is greater than 3 months should be considered; 2, to rule out sudden collapse attack, that is, there is no feeling of steeply falling down to sleep, this symptom is mainly episodic sleep disorder appears inside the situation; 3, specialist examination, laboratory examination indicators, the gold standard of examination is polysomnography examination called PSG PSG has some judgment indicators. There is also a multiple latency test for naps. The PSG test shows that the 24-hour sleep time is more than 660 minutes, i.e., 11 hours. Then the multiple nap latency test shows a sleep latency of ≤8 minutes. Then the drowsiness is not caused by daytime sleep deprivation, which is to be ruled out. The second scenario is to rule out other disorders causing excessive sleepiness, such as sleep apnea syndrome, or excessive sleepiness at night caused by insufficient daytime sleep.