Abstract: A naturalism approach, which presupposes the identity of“to be”and“ought to be” in engineering practice, has an important influence on formulating, implementing, evaluating and revising professional ethics codes of western engineering societies. However, the naturalism approach ignores the generativity and complexity of the relationship between“I”，“Thou”and “It”，thus neglecting the rich and profound value relevance among“I”，“I-Thou” and“I-It”. Thereby, the naturalism approach causes the fracture between“to be”and“ought to be” in real engineering practice contexts. The approach of contextual narrative is about engineering life practice itself. On the one hand, it philosophically previews the possibility of the combination of“how to do well” and“how to live well” in the whole existence of engineering, human, nature and society. On the other hand, the approach of contextual narrative expresses the meaning of the ethical existence of“I”through the encounter of“I”and“face”，and confirms that the“good life” should live together with“I”，“Thou” and“It” in terms of time. By constructing moral consciousness and ethical appeals that“I”should comply with my duties of“ought to be”toward realities of engineering life, and further understanding, comprehending and accepting diverse and complex value relevance among“I”，“Thou” and “It” in the whole existence of engineering, human, nature and society, the approach of contextual narrative could get through“the fracture of method” in the traditional study of engineering ethics.