A method for optimizing a tracking area, comprising: obtaining, by an Operation, Administration and Maintenance entity, OAM, an optimization threshold; and performing, by the OAM, a tracking area optimization according to the optimization threshold; wherein: when the tracking area optimization is performed based on a paging count, the optimization threshold comprises: a tracking area splitting threshold, a tracking area re-planning threshold, or a tracking area combination threshold; wherein: if the optimization threshold is the tracking area re-planning threshold, the performing a tracking area optimization according to the optimization threshold comprises: obtaining information about base stations that need to be re-planned in a current tracking area if the paging count of the current tracking area is greater than the tracking area re-planning threshold; and judging paging capacity of a neighboring tracking area according to the information about the base stations that need to be re-planned in the current tracking area, and planning the base stations that need to be re-planned in the current tracking area to the neighboring tracking area if the paging capacity of the neighboring tracking area permits, or re-planning the base stations that need to be re-planned in the current tracking area if the paging capacity of the neighboring tracking area does not permit. obtaining, by an Operation, Administration and Maintenance entity, OAM, an optimization threshold; and performing, by the OAM, a tracking area optimization according to the optimization threshold; wherein: when the tracking area optimization is performed based on a paging count, the optimization threshold comprises: a tracking area splitting threshold, a tracking area re-planning threshold, or a tracking area combination threshold; wherein: if the optimization threshold is the tracking area re-planning threshold, the performing a tracking area optimization according to the optimization threshold comprises: obtaining information about base stations that need to be re-planned in a current tracking area if the paging count of the current tracking area is greater than the tracking area re-planning threshold; and judging paging capacity of a neighboring tracking area according to the information about the base stations that need to be re-planned in the current tracking area, and planning the base stations that need to be re-planned in the current tracking area to the neighboring tracking area if the paging capacity of the neighboring tracking area permits, or re-planning the base stations that need to be re-planned in the current tracking area if the paging capacity of the neighboring tracking area does not permit. when the tracking area optimization is performed based on a paging count, the optimization threshold comprises: a tracking area splitting threshold, a tracking area re-planning threshold, or a tracking area combination threshold; wherein: if the optimization threshold is the tracking area re-planning threshold, the performing a tracking area optimization according to the optimization threshold comprises: obtaining information about base stations that need to be re-planned in a current tracking area if the paging count of the current tracking area is greater than the tracking area re-planning threshold; and judging paging capacity of a neighboring tracking area according to the information about the base stations that need to be re-planned in the current tracking area, and planning the base stations that need to be re-planned in the current tracking area to the neighboring tracking area if the paging capacity of the neighboring tracking area permits, or re-planning the base stations that need to be re-planned in the current tracking area if the paging capacity of the neighboring tracking area does not permit. if the optimization threshold is the tracking area re-planning threshold, the performing a tracking area optimization according to the optimization threshold comprises: obtaining information about base stations that need to be re-planned in a current tracking area if the paging count of the current tracking area is greater than the tracking area re-planning threshold; and judging paging capacity of a neighboring tracking area according to the information about the base stations that need to be re-planned in the current tracking area, and planning the base stations that need to be re-planned in the current tracking area to the neighboring tracking area if the paging capacity of the neighboring tracking area permits, or re-planning the base stations that need to be re-planned in the current tracking area if the paging capacity of the neighboring tracking area does not permit. obtaining information about base stations that need to be re-planned in a current tracking area if the paging count of the current tracking area is greater than the tracking area re-planning threshold; and judging paging capacity of a neighboring tracking area according to the information about the base stations that need to be re-planned in the current tracking area, and planning the base stations that need to be re-planned in the current tracking area to the neighboring tracking area if the paging capacity of the neighboring tracking area permits, or re-planning the base stations that need to be re-planned in the current tracking area if the paging capacity of the neighboring tracking area does not permit.