An Inaugural Address is a speech made by a speaker when he or she assumes a new position, stating his or her position, views and policies in light of domestic and international political and economic situations. Based on Martin's Appraisal Theory, this paper mainly uses the three subsystems of Appraisal Theory: Attitude, Engagement, and Graduation to explore and analyze the evaluative devices in Kennedy's Inaugural Address and its expression of the speaker's views and attitudes, and to fully reveal the reasons for the enduring popularity of this speech. Index Terms--Inaugural Address, Appraisal Theory, Attitude, Engagement, Graduation