This article puts forward that liver is"the viscera of Qi and blood"and"the viscera of Qi activity". It advocates to regulate liver from Qi

blood

Yin and Yang

as well as summarizes fifteen treating principles of regulating liver

namely soothing liver

suppressing liver

purging liver of pathogenic fire

melting liver

removing heat from liver

calming liver

cooling liver

nourishing liver

dispersing liver

breaking liver depression

intenerating liver

tonifying liver

gentling liver

astringing liver and warming liver. The fifteen therapies of regulating liver is the summary of therapy from liver and fully embodies the characters about physiology and pathology of liver. This article also puts forward regulating Qi and blood and regulating Qi activity are the core of regulating liver.