The understanding of “gallbladder controls the power of decision”in ancient and modern time is mainly confined to the important role that gallbladder plays in human mental and emotional activities,which seems too unilateral. So it’s necessary to re-understand“gallbladder controls the power of decision” by returning the literal meaning of the word “decision”. The substance of “gallbladder controls the power of decision”is that gallbladder stores,secretes and excretes bile,and decides the time and quantity of bile storage and discharge. The manifestation patterns of this kind of decision include regulating the storage and discharge of zang-fu organs, the transformation and metabolism of food and water, and the qi movement as well as qi and blood. Otherwise,the disorder and obstruction of bile storage and discharge could lead to difficult bile discharge or disproportionality of excretory ingredients,and subsequently affect the regulation of storage and discharge of zang-fu organs and finally result in systemic multiple system lesions. The physiological base of “gallbladder controls the power of decision” is the anatomical features of gallbladder,the ascription of zang-fu organs and its concurrent functional properties of storage and discharge.