ObjectiveTo investigate the diagnosis and correlative factors of suspected severe acute respiratory synd rome (SARS) cases, and finally, complete the diagnosis and treatment.MethodsTo analyze the clinical, laboratory data,chest radiog raph and treatment of 100 suspected SARS cases.ResultsAmong 100 suspected SARS cases,66 were diagnosed as SARS,4 were mycoplasma l pneumonia, 2 were pulmonary tuberculosis,the others were general bacteria pne umonia.Conclusions SARS hasn't characteristic clin ical manifestation.Because there is not a gold diagnosis standard up to now, the disinfection and isolation of suspected SARS cases should be treated as SARS c ases. In order to prevent missed and misdiagnosis, the diagnosis and treatment s hould be synthetically thought.