With the holistic viewpoints and treatment offered upon differentiation of syndromes as the guidelines, TCM internal therapies can be divided into ten therapeutic principles to relieve the exterior, dredge the interior, clear away heat, eliminate obstruction by warmth, expel phlegm, remove dampness, circulate qi, activate blood, promote healing with internal therapies, and promote tonification.For infectious diseases, based upon the pathological features in the different stages of tumefaction, suppuration, ulceration and healing, three general therapeutic principles of the dispersing, promoting and tonifying methods are also established.