A wireless communication system in TV broadcasting band (470MHz-710MHz) has been developed. In the system its operational channels are set to the radio equipment according to calculation results provided from the white space database (WSDB). By the system, efficient wireless communication environment to accommodate increasing mobile traffic is expected, which consequently loads off traffic of wireless networks where current throughput is not sufficiently achieved due to traffic congestion and radio interference. This paper describes specification of white space database, white space base station, and its operation scheme.