The method and apparatus for measuring bio signal

Detecting a back reflected infrared signal irradiated to the body to extract the spectral data in the detected infrared signal and obtains the data corresponding to the predetermined frequency in the extracted spectral data, the obtained data, the multiple regression analysis (MLR, Multiple Linear Regression) to a method and apparatus for obtaining a biological information measurement model, and measuring the body's biological signal by using the acquired biometric information measuring model is disclosed.