Wireless information channel access method and system

The invention provides a wireless information channel access method and a system. The method includes that an access station sends a radio frame comprising access parameters of at least one group of stations; and a station receives the radio frame, the station is contained in the at least one group of stations, when the stations contain to-be-sent data, and according to the access parameters of the stations of the group, data sending is conducted by utilizing a competitive mode during uplink transmission time of the access parameters. The access station of the method sends the radio frame comprises the access parameters of the at least one group of stations, the stations are accessed into the information channels through a competitive mode during uplink transmission time of scheduling time for the stations, data transmission is conducted, lower energy consumption of the stations can be guaranteed, system overhead of the sending of the uplink transmission time parameters by each station is reduced, and the purposes of electricity saving and battery using time prolonging are achieved.