Chanting Amitabha is the practice of Pure Land School. From master Huiyuan, the first ancestor of Chinese Pure Land School, to master Yinguang, the 13th ancestor of Pure Land School, a systematic view of chanting Amitabha practice has been formed. This paper examines the practice of chanting Amitabha taught by the ancient and modern eminent monks and lay Buddhists that the chanting Amitabha is both unique and universal in unity of knowledge and practice.