The article summed up the relation between fluorine in the natural environment and human health.Appeal to people not to neglect physiology function of the fluorine to the human body.The shortage of the absorb quantity can cause decayed tooth or Kaschin-Beck disease,indicating importance relation between halogen and the human body health,in the human body.The bone is influenced by fluorine,the heart is influenced by chlorine,the nervous system is influenced by bromine and the intelligence is influenced by iodine.At the same time,this paper describes a mechanism for causing disease and a principle for treatment of an excess or shortage of elements may all cause diseaseand we should dispel excessive element and absorb shortage element.We advocate food therapy and drinking therapy for the prevention and cure of the local disease.Finally,it is suggested that the local disease should be named after the absorbed element content because it can reflect cause of the disease and definite treatment method,meanwhile doctors and patients can be all understanding.