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_{Heart sound is an important biological information to measure the state of heart. The feature detection of heart sound has a positive meaning in the medicine science.A feature detection and record system based on SOPC/NiosⅡ for heart sound is designed. The hardware of system is consisted of preprocessing module, AD convert module, display and transmits module and etc. The SOPC system was build on the FPGA chip. It uses the NiosⅡsoft kernel to compute and analyze the data of heart sound, then the features of heart sound were extracted. Experimental results show that the system can gather the patient’s heart sounds well, it can decompose the heart sound by the EMD (Empirical Mode Decomposition). And the frequency spectrogram and the figure of short-time average energy were showed at the same time. The system can send the data through the wireless network. The healthcare workers can remote monitor the heart state of the patient.}