Mycoplasma pneumonia can be diagnosed through the following three aspects, the first is the clinical manifestation, the second is the blood system examination, and then the X-ray examination. Clinical manifestations of mycoplasma pneumonia, the patient mainly through droplet transmission, usually after 2-3 weeks of incubation period, the incidence of the population in adolescents is the most common, the clinical manifestations are relatively mild, the main symptoms are fever, headache, sore throat, dry cough, caused by the course of pneumonia will be relatively slow, the fever is mainly low to medium fever, the temperature is generally not more than 38.5 ℃. Some patients will have paroxysmal, irritating dry cough, and a few patients will have sputum. Mycoplasma pneumonia can develop throughout the year. Blood system examination, blood routine will suggest that the patient’s blood leukocytes are normal or slightly elevated, chest X-ray suggests that the lung changes of interstitial pneumonia, but also can carry out the blood screening of mycoplasma antibody, if the titer of the IgM antibody test > 1:40, suggests that mycoplasma infection is positive, which can support the diagnosis of mycoplasma pneumonia.