A wireless communication system includes: at least one base station that forms a plurality of cells of different frequencies such that the cells partially or completely overlap with each other; and a terminal that is capable of recognizing the cells of the different frequencies. The base station determines priority factors of the different frequencies of the cells, and transmits the priority factors to the terminal that has set a cell formed by the base station as a serving cell. The terminal receives the priority factors from the base station forming the serving cell, and selects a cell to be set as the serving cell next from among the cells based on the priority factors.