The definition of dynamic frequency process in power system, the significance of the research of dynamic frequency process and existing research tools which are the numerical simulation method and the research method based on the measured trajectory in the direction are introduced in this paper. The specific research directions are summarized on the method which based on the measured trajectory, the research status from domestic and abroad and the tight connection among these researches are elaborated, and the influences of large-scale wind power integration to the dynamic frequency process are also discussed. The paper puts forward the study outlook and provides the theory proof for the further research on the subject of dynamic frequency process.