The authors explore and analyze the origin of six climatic exopathogens concept. The authors think that life observation is a direct source of climate pathogenicity. Correspondence between human body and natural environment is the guiding ideology of six-Qi pathogenicity frame. "Three-element"theory establishes the number "six"of"six climatic exopathogens". Image thinking is the main thinking mode of constructing six climatic exopathogens concept. The authors point out that six climatic exopathogens is exogenous pathogeny symbol based on six-Qi of wind

cold

summerheat

dampness

dryness and heat. The concept has the dual significance of abstraction and meteorology.