The "meridian theory" is the summary and sublimation of long-term medical practice of the Chinese ancient sages. Via reduction and reconstruction about the theoretical system, it has been put forward a doctrine of "binary structure" about the meridian and acupoints which, at the limbs, present a longitudinal arrangement, and those at the head-face and trunk present a horizontal distribution, being closely related to the "dematome" of the body. Centered on the ontogenesis of the embryonic "somite", a closely connected "structure-function unit" complex is formed with the development of the dermis-muscle-ogran-nerve within the homo-segment. This form constitutes the basic characteristics of pathological reaction rules and therapeutic effects of meridian acupoints.