Professional Commitment is an attitude, and it is the core and spirit of professionalism. In addition to increasing personal stability in the profession, it also enables individuals to reach their professional goals in general. Because nurses usually have more opportunities than other health care professionals to be in contact with patients, patients receive most of their information about health care from nurses. If nurses accept professional commitment as early as possible, the quality of patient-care will be improved. That is the reason why professional commitment is regarded as the hallmark of quality in professional care. This paper will use the conceptual analysis framework developed by Walker and Avant (1995) to examine and analyze professional commitment and establish its relationship with nursing. The authors hope that it can provide nurses with the opportunity to understand this concept more fully, to support their own profession, to raise the position of the nursing profession and to guarantee the health of the general public.