To design a portable heart sound collection and analysis device, and can locate the first heart sound (S1) and the second heart sound (S2).Measurement Studio was used as the development platform to realize the acquisition, storage and analysis of heart sounds of congenital heart patients. In this paper, the double threshold segmentation method is used to locate S1 and S2.The system better to complete the patient heart sound signal acquisition, storage, echo and playback function. The effect of sound filtering is obvious, and the envelope after filtering can locate S1 and S2 well. Through the system to complete the census of congenital heart disease, compared to the experts personally go to the remote mountain area onsite auscultation, more convenient and quick. For the future development of heart sound auscultation equipment to lay the foundation.