Abstract: According to the theory of hemodynamics, a microcomputer-based automatic real-time detection system for the blood flow parameters of cardiovascular system is described. It is a safe, noninvasive, convenient system that provides the physician or investigator with a total of 12 blood flow parameters including mean arterial pressure, heart rate, stroke volume, cardiac output, peripheral resistance, arterial compliance and a sphygmograms. Some special techniques for computing cardiac output is presented from pulse wave contour taken on the wrist by using transducer and excellent performance of the system is obtained from clinical tests for healthy persons and sick persons. The results of study have found a wide application in clinical medicine, preclinical medicine, air medicine and health examination.