As a relatively responsive and interactive relationship with students, university teachers are social actors who shape a certain habitus in a specific field of education. The age angle formed between students and their different career stages leads to the conflict between the existing habitus and the field of continuous conversion. Based on the narrative study of several cases in A university, this paper investigates the career process of university teachers with the explanation framework of the contradictory movement between field conversion and existing habitus. It is suggested that university teachers should adopt active action strategies rooted in the initial disposition and inclination system, and should constantly reconstruct their habitus with the change of field, so as to achieve their career development.