Abstract: <b<Objective</b< To explore the X-ray characteristis of SARS. <b<Methods</b< To assay the chest X-ray and the CT images of SARS about 39 cases, who have been comfirmed diagnosis in clinical. <b<Results</b< Patches, styipes and ground-grass opactification were found on chest X-ray of SARS. Dynamic observation, the local changes fasting and wandering, ground-glass density and air-space opacities are present in CT images. <b<Conclusions</b< The X-ray and CT images of SARS have some characteristic. Couldn't diagnose only by these, but also combinate the epidemiologic, the clinical laboratory examinations and the X-ray examinations to synthetic diagnose.