Currently, our country have introduced IS audit system to manage and supervise stable development and efficient operation of the IS. IT audit is accomplished by IS auditor using standard check items made by our government. As IT paradigm drastically changes and user’s IT service demands level is high, Flexible change or modification of standard check items is inevitable. It is reasonable to change or modify them according to the priority after establishing relative weight inter-standard check items. To do this, domestic standard check items are represented as hierarchical structure using Hierarchical Decision Model (HDM) and relative weights and priority among them are obtained by Constant-sum Method in this paper. This result will give a logical validity enough to modify or change domestic standard check items.