This article briefly introduces the characteristics of the age of big data and its specific requirements for national intelligence activities and analyzes the existing unharmonious phenomena and problems of national intelligence activities in the age of big data. On this basis, the dynamic mechanisms of the succession of the national intelligence activities system is studied from three aspects: the internal force excitation mechanism, external force triggering mechanism and internal and external force coordination mechanism，and proposes the driving mode that is strengthening support force, pulling force, thrust and weakening pressure to promote its harmonious succession of national intelligence activities in the age of big data.