Sleep quality monitoring system and method based on magnetocardiogram

The invention relates to a sleep quality monitoring system and method based on a magnetocardiogram. The monitoring method comprises the steps of S10, collecting magnetocardiogram signals and blood oxygen signals of the sleep time of a target user by means of the monitoring system; S20, performing preprocessing and noise reduction processing on the magnetocardiogram signals, screening available magnetocardiogram signal time periods, and obtaining a middle magnetocardiogram signal; S30, extracting the middle magnetocardiogram signal by adopting a QRS wave detection method and a cardiopulmonary coupling algorithm to obtain a characteristic signal for reflecting the sleep quality of the target user; S40, conducting preprocessing and characteristic value extraction on the blood oxygen signals, and adopting a pre-trained machine learning model for screening a time period capable of reflecting a breathing event of the target user; and S50, based on the characteristic value and the characteristic signal of the blood