Abstract: Faith is the subject's ultimate conviction of certain object coming from the practice and is regarded as the ultimate value by means of which the subject forms a strong feeling and ideological tendency towards its own spiritual sustenance. Faith is a kind of human's spiritual transcendence of the limit of his natural existence, self-ability, and social existence, and is the spiritual pursuit of immortal life. Non-reality of object of faith, transcendence of faith value goal, illogic nature of faith expression and exclusiveness of faith direction, etc. are essential features of faith.