A notification light adjusting method, wherein the notification light is a kind of signal light with even change of brightness, which simulates a breathing effect of human being and serve as notifications and reminders, characterized by comprising: determining a relation curve representing relationship between visual brightness and an electrical signal of the notification light; wherein said determination comprises: determining a first relation curve representing relationship between actual luminescence amounts and electrical signals of the notification light and, a second relation curve representing relationship between visual brightness and actual luminescence amounts of the notification light; equally dividing a visual brightness interval of the notification light to obtain a plurality of visual brightness levels according to a brightness level threshold, and determining an electrical signal value corresponding to each visual brightness level according to the said relation curve; determining, for each visual brightness level, a ratio between the corresponding electrical signal value and a maximum electrical signal value; and adjusting, according to the ratio between the electrical signal value corresponding to each visual brightness level and the maximum electrical signal value, a magnitude of a PWM duty cycle control signal inputted into the notification light by generating, for each visual brightness level, the PWM signal to have a duty cycle according to a period of the PWM signal and according to the ratio between the respective electrical signal value and the maximum electrical signal value; and inputting the PWM duty cycle control signal corresponding to each visual brightness level into the notification light sequentially, such that the notification light presents a sequential change in brightness according to the visual brightness level. determining a first relation curve representing relationship between actual luminescence amounts and electrical signals of the notification light and, a second relation curve representing relationship between visual brightness and actual luminescence amounts of the notification light; equally dividing a visual brightness interval of the notification light to obtain a plurality of visual brightness levels according to a brightness level threshold, and determining an electrical signal value corresponding to each visual brightness level according to the said relation curve; determining, for each visual brightness level, a ratio between the corresponding electrical signal value and a maximum electrical signal value; and adjusting, according to the ratio between the electrical signal value corresponding to each visual brightness level and the maximum electrical signal value, a magnitude of a PWM duty cycle control signal inputted into the notification light by generating, for each visual brightness level, the PWM signal to have a duty cycle according to a period of the PWM signal and according to the ratio between the respective electrical signal value and the maximum electrical signal value; and inputting the PWM duty cycle control signal corresponding to each visual brightness level into the notification light sequentially, such that the notification light presents a sequential change in brightness according to the visual brightness level.