A paging method that comprises: delivering, by a Mobility Management Entity, a new Track Area Identity List allocated to a User Equipment to the User Equipment; and paging, by the Mobility Management Entity, the User Equipment by using an International Mobile Subscriber Identity in Track Areas corresponding to Track Area Identities contained in an existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment, after a network error is detected; wherein, paging the User Equipment in Track Areas corresponding to Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment comprises: determining, by the Mobility Management Entity, Track Area Identities corresponding to Track Areas served by corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment; inserting, by the Mobility Management Entity, the Track Area Identities corresponding to the Track Areas served by the respective corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment, into paging messages that are to be sent to the respective corresponding base stations; and sending, by the Mobility Management Entity, the paging messages inserted with the Track Area Identities to the respective corresponding base stations. delivering, by a Mobility Management Entity, a new Track Area Identity List allocated to a User Equipment to the User Equipment; and paging, by the Mobility Management Entity, the User Equipment by using an International Mobile Subscriber Identity in Track Areas corresponding to Track Area Identities contained in an existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment, after a network error is detected; wherein, paging the User Equipment in Track Areas corresponding to Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment comprises: determining, by the Mobility Management Entity, Track Area Identities corresponding to Track Areas served by corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment; inserting, by the Mobility Management Entity, the Track Area Identities corresponding to the Track Areas served by the respective corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment, into paging messages that are to be sent to the respective corresponding base stations; and sending, by the Mobility Management Entity, the paging messages inserted with the Track Area Identities to the respective corresponding base stations. determining, by the Mobility Management Entity, Track Area Identities corresponding to Track Areas served by corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment; inserting, by the Mobility Management Entity, the Track Area Identities corresponding to the Track Areas served by the respective corresponding base stations and included in the Track Areas corresponding to the Track Area Identities contained in the existing Track Area Identity List of the User Equipment and in the new Track Area Identity List allocated to the User Equipment, into paging messages that are to be sent to the respective corresponding base stations; and