An automatic diagnosing method for the
autonomic nervous system and a device thereof are described. The device comprises a sensor, a computing device and an
output device. An
electrode of the sensor is adhered to the
skin surface of a subject to detect and output the
heart beat signal of the subject. The computing device collects the
heart beat signal from the electrodes through the
signal collection leads. The computing device further amplifies, filters, digitizes and transforms the
heart beat signals into a plurality of
heart rate variability parameters. Further, calculations, validation and analysis are performed on these parameters. After selecting a corresponding diagnosis description statement from a
lookup table in a
database, an examination report, which incorporates the diagnosis description statement and the
heart rate variability parameters is output.