Objective: Preliminary analysis the diagnosis and treatment of CAP. Methods: Clinical data of 706 cases were randomly selected from 2010 to 2014, a total of 3155 cases of CAP for analysis. Results: Incidence was same between men and women. Predilection season of CAP were at the period of low temperatures and sudden changes in temperature. Elderly patient had longer hospital stays and higher mortality rate. Conclusion: Elderly CAP patient should be more concern.