In an attempt to investigate the current of clinical researches on spleen yang or vital energy deficiency syndrome, the results were as follows. 1. It is possible to occure spleen deficiency syndrome which come from genetic factor. 2. The absorption disturbance in spleen deficiency syndrome can be likely caused by gastrointestinal mucosa injury, disorder of vagus nerve funtion and impairment of excretion of exocrine gland in pancreas. 3. Owing to the failure of tansporting and converting funtion of spleen, minerals, hematogenic substance and nutritional substance are scanty and then imbalanced metabolism state which heat production is decreasing is appeared. 4. By the failure of vital energy and blood growth, decreasement of $O_2$ transportation ability of RBC, disoder of blood coagulation, immune system disturbance which humoral immunity is enhanced and cellular immunity is decreased, are noted. 5. While there is not still an attemt to study the spleen deficiency sydrome in muscle disease or disease of four extremities, but it is likely suggested that spleen-stomach supplyment thereapy is very excellent effect on muscle disease and disease of four extremities.