Provided is a sleeping state judgment method and system using a body movement detection sensor which judges a sleeping stage using only respiratory signals and judges the sleeping stage in a non-supine position. The sleeping state judgment method and system is characterized in that the body movement detection sensor stores a body movement signal generated by respiratory movement during a unit time, obtains the frequency spectrum of the stored body movement signal, and judges a non-sleeping state and a sleeping state according to the distribution of higher harmonic waves in the frequency spectrum, and preferably characterized by judging REM sleep and non-REM sleep according to the distribution of second higher harmonic waves and third higher harmonic waves in the frequency spectrum.
SLEEPING STATE JUDGMENT METHOD AND SYSTEM