This study focus on the legislative conflict for Se-Jong City In case of this paper, the law of administration agency centered is based on the conflict of legislative conflict present government at that time suggested the amendment of that legal status because of so many inefficiency and negative effects regardless of opponent asserts. Here there were a deep various political interests fundamentally both of sides. Legislative conflict here affects the regional conflict among the benefits and indirect benefits or nothing in any area. As the result, political interest deeply which was connected in politics influenced the big national issues, not to amend as a result government failure will be come.