Through the reanalysis of the theory of triple energizer and pericardium， it was found that as one of the six fu-organs， the triple energizer had a certain structure and specific physiological functions. It was believed that the triple energizer should be an independent latent space surrounded by the membrane inside the body cavity. Through combing the theory of the pericardium- triple energizer -membrane system， it was proposed that the pericardium should govern membrane， the external and internal relations between the pericardium and the triple energizer， realize the functional interconnection through the membrane and the meridian system， and the pathological mutual influence， therefore guiding the clinical practice.And the treatment and prescription of pericardium- triple energizer -membrane system diseases were been explained.