This paper tries to explain CEEC’s item bank and gives suggestions for its further improvement. It points out that the purpose of establishing this item bank is to promote item quality, stabilize item difficulty index, expand number of item writers and cope with incident of crisis. Five missions of the item bank have been identified and explicated namely: (1) set up the item development process; (2) build up computer data bank system; (3) arrange space for discussions and meetings; (4) set security facilities; (5) set standardized operating procedure. CEEC’s item bank has been implemented since 2006 for SY2006 DRT, the Department Required Test. The test analysis shows that the item difficulty index and discriminating index are acceptable and reliable. This result indicates that the goals of the item bank have been partially fulfilled at the present stage.