Through the study of classics and clinical practice， the theory that “the liver is the

zang

（脏） organ of cluster diseases” is put forward. By analyzing the etiology， pathogenesis and manifestations of the common “

qi

movement disease cluster”， “generation-restriction disease cluster” and “stirring wind disease cluster”， the four main principles of “treating from the liver” of miscellaneous diseases of internal medicine are explained， namely harmonizing

shaoyang

（少阳）， soothing the liver and resolving constraint， usually with

Sini Powder

（四逆散） and

Xiaoyao Powder

（逍遥散） in their modifications； harmonizing liver and spleen， clearing and draining constraint heat usually with modified

Danzhi Xiaoyao Powder

（丹栀逍遥散） and

Pingwei Powder

（平胃散）； calming the liver and subduing

yang

， extinguishing wind and harmonizing blood usually with modified

Tianma Gouteng Beverage

（天麻钩藤饮） and

Zhengan Xifeng Decoction

（镇肝熄风汤）； and supplementing liver， harmonizing blood and nourishing

yin

usually with modified

Siwu Decoction

（四物汤） and

Sijunzi Decoction

（四君子汤）.