A radio base station including: each of communication processing components being coupled to each of antennas forming each of sectors for a radio communication respectively, each of the communication processing components including communication processors being configured to perform each of functions for the radio communication and control each of radio resources for each of the functions respectively, and a control processor configured to select a first communication processing component and a second communication processing component respectively, select a first communication processor from the communication processors in the first communication processing component, transfer a radio resource of the radio resources that is controlled by the first communication processor to a second communication processor that is in the second communication processing component and performing a same function as the first communication processor, and upon transferring the radio resource of the radio resources, reduce a power of the first communication processor.