Doctor candidates get the academic identity and academic capital in his field by the thesis writing. The dissertation proposal defence hold on the public field promotes the state of academic and legalizes the discipline of the academic community. During the dissertation proposal defence, doctor candidates may face three conflicts. The first is conflicts from the interest of academic profession and the interests of the research question. Self-character will be constructed by this conflicts. The second is the conflicts from the research paradigm of doctor candidates and the dissertation committee. This conflict will change the paradigm of academic research. The third is the conflicts from the academic and praxis group. This conflict is between the academic and politics. The adviser of doctor candidates will make use of dissertation proposal defence to settle the conflict. (Contains 1 table and 2 figures.)