Both novel coronavirus and SARS coronavirus are more powerful and cannot be simply distinguished. The new coronavirus is more infectious than SARS coronavirus, but its virulence and pathogenicity are slightly weaker than SARS coronavirus. once SARS is formed, the patient’s condition is quite serious, with more rapid onset of acute respiratory distress syndrome and respiratory failure, and its morbidity and mortality rate is slightly higher than that of patients with new pneumonia. The new coronavirus is more infectious and prone to outbreaks, especially since the number of cases and deaths from new coronavirus pneumonia recently exceeded that of SARS. Therefore, both the new coronavirus and SARS coronavirus need to be protected against outbreaks and spread.