Although the subject of ideological and political education has political and ideological character, it is theoretically not a political subject and its macroorientation can only be the exploration on the law of practical activity process of ideological and political education and the cultivation of educators’ ability in ideological and political practice. How to influence other people in the perspective of ideological and political field is the core of microstructure of ideological and political education subject. This subject must aim to study ideological and political education work practice in every social field of China and to cultivate ideological and political education practice capacity in different social fields, redefine the boundary of the subject, regard ideological and political education practice as its core and reconstruct scientific system with ontology knowledge, practical knowledge and conditional knowledge.