The present invention relates to a ventricular fibrillation diagnostic apparatus and a driving method thereof, obtaining an RR interval and an area of a power spectrum of a QRS from an electrocardiogram signal, obtaining an inclination and a correlation coefficient by analyzing the RR interval and area of the power spectrum of the QRS as bivariate data through a relation of a primary regression equation wherein an inclination and correlation coefficient is obtained using the RR interval, and distribution and covariance of the area of the power spectrum of the QRS； thereby determining whether ventricular fibrillation is occurring. The ventricular fibrillation diagnostic apparatus comprises: an electrocardiogram signal detection part detecting an electrocardiogram； and a calculation processing part detecting a parameter of the electrocardiogram including the RR interval from an electrocardiogram signal received from the electrocardiogram signal detection part, and determining whether ventricular fibrillation is occurring using the electrocardiogram parameters. The calculation processing part comprises an electrocardiogram parameter detection part, a bivariate data calculation part, and a ventricular fibrillation analysis part. The electrocardiogram parameter detection part detects the RR interval and the area of the power spectrum of the QRS from the electrocardiogram signal received from the electrocardiogram signal detection part. The bivariate data calculation part obtains the correlation coefficient using the RR interval and the area of the power spectrum of the QRS as bivariate data, and obtains distribution of the RR interval and distribution of the area of the power spectrum of the QRS. The ventricular fibrillation analysis part determines whether ventricular fibrillation is occurring by the correlation coefficient, the distribution of the RR interval, and the distribution of the area of the power spectrum of the QRS.본 발명은, 심전도 신호로부터 RR간격, QRS의 파워스펙트럼의 면적을 구하고,
