A wireless communication system of the invention comprises a plurality of communication stations decentralized-autonomously construct a network without having a relation between a control station and a station to be controlled under a communication circumstance where a plurality of channels are prepared. In this case, each of the communication stations prepares a plurality of operation modes for activating transmitting and receiving operations, informs the own operation mode, and receives information regarding operation modes of peripheral stations to manage its operation mode of each of the peripheral stations.