This research developes out with knowledge structure for the on line computerized adaptive test item bank system,and makes up a set of knowledge structure based computerized adaptive diagnostic test system, combining with computerized adaptive diagnostic testing system and on line remedial instruction system, which can provide for all teachers by web browser entering this system, we can carry out (1) the building and administration of item bank system ,(2)the remedial instruction system , according to the test result.The sub-system hopes provide teachers to establish and edit examination questions,according to the knowledge structure.and to use or modify the examination questions after examined by experts.
