The characteristics of the pathogenic summer-heat and the primary important element of the season time dimension present parallelism principle on the forming mechanisms of five supremacies principal syndromes of initial summer febrile disease and four clinical characteristics of pathogenic factor summer heat. To explore the characteristics and the five successive evolutive phases corresponding to five elements phase theory of season and seasonal periods is provided with decisive guiding effect of passing through overall situation in the course of treating heat diseases caused by exogenous pathogenic factor based on syndrome differentiation in terms of the syndrome recognizing,establishing therapy principle and selecting Chinese materia medica to from a formula.It also presents effective resources and thoughts used for reference on the "bird flu" of nowadays,influenza of the human being(epidemic) that is likely to break out and how to treat these super-variations of virus(pestilential qi) based on syndrome differentiation with traditional Chinese medicine.