1. A method for automatically optimizing a neighbor list for processing handover in a synchronous WCDMA (Wideband Code Division Multiple Access) network, comprising: (a) collecting, by a data collecting unit, neighbor list data, call fault data, handover statistical data, base station location data and PSC (Primary Scrambling Code) information data of each base station sub-cell (or, sector) in a nationwide network; (b) extracting, by a data analyzing unit, all target sub-cells (or, sectors) available for handover by analyzing the collected data; (c) calculating, by a base station searching unit, the number of intermediate base stations positioned within a distance between a source base station and a target base station and existing within a threshold angle toward the target base station based on the source base station and a threshold angle toward the source base station based on the target base station, as for the extracted target sub-cells (or, sectors); and (d) determining, by a data sorting processing unit, priorities of the target sub-cells (or, sectors) by sorting such that a target base station with a relatively lower index, calculated including the number of intermediate base stations and the distance, has a higher priority; (e) wherein the index is calculated using an operation that multiplies the number of intermediate base stations by a value obtained by endowing a predetermined weighting factor to the absolute distance between the source base station and the target base station; (f) subsequently inputting, by a list input unit, the target sub-cell (or, sector) information to the neighbor list according to the priorities.