This thesis mainly studied whether Taxation agency could introduce data mining techniques to assist the process of selecting cases which have violated tax policies and regulations. The results showed that precision and recall rate produced by data mining classification models are better than the traditional cases selection process in the detection of bogus business entity. Consequently, it is believed that Taxation agency will highly improve the efficiency of the allocation of manpower if data mining techniques is introduced into the tax administration activities. However, the study also suggests that the key to facilitate the activities of selecting cases properly is to establish a mechanism and a standard operation procedure for data mining process.