The present invention relates to the wireless communication field, in particular to a tracing area list updating controlling method and a system for resolving the problems in the prior art of the complex updating controlling and the enormous paging loading in the wireless communication system caused by the enormous TA list which is updated and controlled by the UE and core network control node. Inthe present invention, when the UE supervises that the duration time of leaving a TA reaches the presetting time length, the TA identification corresponding to the TA list is deleted, and the deleting result is informed to the core network control node; the core network control node synchronistically deletes the TA list local stored the UE according to the deleting result. The technical proposalof the present invention is adopted to control the size of the TA list, thus the complexity of updating controlling the TA list is reduced, the performances of the UE and the core network control nodeare improved, and simultaneously the paging area is also reduced and the paging loading of the wireless communication system is reduced.