An electroencephalogram (EEG) signal-based anesthesia depth monitoring method and system, said method comprising: acquiring EEG signals from a patient and pre-processing the EEG signals to obtain interference-free EEG signals (S100); calculating the fluctuation function of the interference-free signals by means of an improved elimination trend moving average algorithm, and calculating the anesthesia depth index according to the fluctuation function (S200). The interference-free EEG signals are calculated by means of an improved elimination trend moving average algorithm, so as to obtain an anesthesia depth index, thereby improving the real-time performance, robustness and accuracy of anesthesia depth monitoring, and maintaining the reliability of detection in the case of poor quality of EEG signals.
ELECTROENCEPHALOGRAM SIGNAL-BASED ANESTHESIA DEPTH MONITORING METHOD AND SYSTEM