[Discussion on the constructing principle of syndrome differentiation system according to meridian and collateral theories].

According to the meridian and collateral theories in the Internal Classic, the authors proposed that the construction of the syndrome differentiation system with science characteristics of acupuncture and moxibustion should follow the principle of systemic structure and physiological function. The establishment of the whole frame structure of syndrome differentiation system according to meridian and collateral theories should base on the principle of systemic structure and the establishment of symptom of each syndrome should base on the principle of physiological function.