The present invention provides a method and system of auditory evoked heart rate variability analysis having advantage of simply analytical process and portability. The disclosed method mainly includes the following steps of: stimulating the auditory system of a person by a sound through a sound transmission device, capturing an electrocardiogram signal of the person, performing analog-to-digital conversion of the electrocardiogram signal, selecting the peaks of the electrocardiogram signal and transforming the qualified peaks to a consecutive peak signal, and performing spectrum analysis to the peak signal in frequency domain, and obtaining the difference of the spectral parameters before and after the evoked sounds. Moreover, the sound further is selected from the group consisting of noise, short tone burst, click, and any other sound with the intensity of 30 dB to 100 dB. By comparing the heart rate variability analysis before or after sound stimulation in order to get the differences, the disclosed method and system of auditory evoked heart rate variability analysis can evaluate a changing index of stimulated autonomic functions.
