In March 2010，the U.S.President Barack Obama submitted to the Congress a report entitled National Framework for Strategic Communications，a comprehensive report on the nature，objectives and implementation system of America’s state-driven mechanism of propaganda which directly serves the U.S.national strategic and military objectives. The report is a landmark signifying to more proficient and integrated capabilities of America’s state-driven communications efforts targeting at both domestic and foreign audiences. Study on the formation of the U.S. national communications system and its role in the U.S.overall national security strategy may help people understand “the sources of American conduct” at both strategic and tactical levels.