The modeling of operational concepts is to describe the operation concept completely， accurately and clearly， using language， symbols， tables， graphs and so on to abstract and simplify the description of the imagined real war system. When the commonly used conceptual modeling language methods are adopted in modeling large system-of-systems operations such as air and space defense， complexities and messiness can be present. Object-process methodology （OPM） is advantageous as it has a unified view and combines object orientation and process orientation. A brief introduction is given to the operational concepts of system of systems for all-domain air & space defense. To address the difficulties of traditional methods in operational concepts modeling， OPM and DoDAF are adopted that allows for concise and clear expressions of operational concepts and analysis of their relationships and operational processes. It’s conducive to the correct establishment of the simulation model for the next step.