The physical functions of the heart and brain is based on the sufficiency,fluency and balance of qi and blood. Therefore,the basic pathogenesis of cardio-cerebrovascular diseases should be imbalance of qi and blood. Any causative agent is bound to influence the harmony of qi and blood once it attacks the heart and brain,its evolving laws are qi stagnancy and blood stasis at early stage,subsequent cementation of phlegm and blood stasis,and more qi deficiency and more blood stasis in the end. Regulating qi and activating blood circulation may harmonize qi and blood,balance yin and yang,which should be served as the basic therapeutic method for treating cardio-cerebrovascular diseases.