Aiming at the study focus of command information system of current years, put forward an operational architecture design method of air defense force information system. Based on deeply analyze DoDAF, give the steps of operational architecture design of air defense force information system. Integrate specific activities, establish the operational architecture models, and describe the points and information relation of points from different aspects. Results show that the model is simple and easy to understanding, it is very important for improving the top-layer design of command information system.