A method for accessing an access point by a station device, comprising: acquiring, by the station device, channel quality information of multiple access points; determining, by the station device, a master access point from the multiple access points according to the channel quality information of the multiple access points, and accessing the master access point; sending, by the station device, information about remaining access points from the multiple access points except the master access point to the master access point, so that the master access point determines a slave access point according to the information about the remaining access points and coordinates with the slave access point to perform data transmission with the station device; receiving, by the station device, first coordination cluster information sent by the master access point, wherein the first coordination cluster information comprises information about the master access point and information about the slave access point; updating, by the station device, local first coordination cluster information according to the received first coordination cluster information, so as to perform data transmission with the master access point and the slave access point separately according to updated local first coordination cluster information, and characterized in that the acquiring, by a station device, channel quality information of multiple access points further comprises: periodically scanning, by the station device, access points according to a preset scanning period t s, and acquiring the channel quality information of the multiple access points; and if a change value between channel quality of multiple access points that is acquired in a current scan and channel quality of multiple access points that is acquired in a previous scan is greater than or equal to a first set range, shortening the scanning period; or if channel quality change values of multiple access points, which are acquired in n consecutive scans, are less than the first set range, prolonging the scanning period, wherein n is an integer greater than or equal to 1. acquiring, by the station device, channel quality information of multiple access points; determining, by the station device, a master access point from the multiple access points according to the channel quality information of the multiple access points, and accessing the master access point; sending, by the station device, information about remaining access points from the multiple access points except the master access point to the master access point, so that the master access point determines a slave access point according to the information about the remaining access points and coordinates with the slave access point to perform data transmission with the station device; receiving, by the station device, first coordination cluster information sent by the master access point, wherein the first coordination cluster information comprises information about the master access point and information about the slave access point; updating, by the station device, local first coordination cluster information according to the received first coordination cluster information, so as to perform data transmission with the master access point and the slave access point separately according to updated local first coordination cluster information, and characterized in that the acquiring, by a station device, channel quality information of multiple access points further comprises: periodically scanning, by the station device, access points according to a preset scanning period t s, and acquiring the channel quality information of the multiple access points; and if a change value between channel quality of multiple access points that is acquired in a current scan and channel quality of multiple access points that is acquired in a previous scan is greater than or equal to a first set range, shortening the scanning period; or periodically scanning, by the station device, access points according to a preset scanning period t s, and acquiring the channel quality information of the multiple access points; and if a change value between channel quality of multiple access points that is acquired in a current scan and channel quality of multiple access points that is acquired in a previous scan is greater than or equal to a first set range, shortening the scanning period; or if channel quality change values of multiple access points, which are acquired in n consecutive scans, are less than the first set range, prolonging the scanning period, wherein n is an integer greater than or equal to 1.