A detecting method for a
behavior disorder event during rapid-eye-movement sleep is provided. The detecting method includes: collecting a
heart rate value and a motion value of a user per epoch within a time period; generating a plurality of corresponding sleep condition values by using the motion values, to distinguish epochs into an awake period and a
sleep period; transforming the motion values corresponding to the
sleep period into a
score according to a predetermined rule, to generate a plurality of sleep depth scores, and distinguishing the
sleep period into a
light sleep period and a deep sleep period by using the sleep depth scores; grouping the
heart rate values corresponding to the deep sleep period as a
high heart rate group and a low
heart rate group; and determining, when the motion values corresponding to the
high heart rate group satisfy a condition, that a
behavior disorder event happens.