Invaluable Formulas for Emergency collects the academic thoughts and clinical experiences in treating exogenous febrile diseases. In a board sense it is believes that cold damage is infectious and includes epidemic diseases. Zhang Zhongjing's medication experience has been recorded in Invaluable Formulas for Emergency. The paper do a research in Zhongjing-related documents in Invaluable Formulas for Emergency from the review of literature and clinical application.