A method for joint configuration of power and channel of a WLAN is provided, including: selecting transmitting power of each AP from transmitting power ranges of APs of a WLAN to form an AP transmitting power combination; determining a set of AP operating channel combinations corresponding to each AP transmitting power combination according to operating channels of the APs in the WLAN; calculating an estimated load of each AP corresponding to each AP operating channel combination corresponding to each AP transmitting power combination, and calculating KPIs of the WLAN corresponding to each AP operating channel combination according to the estimated load of each AP; and selecting, according to the calculated KPIs, an optimal channel configuration scheme of the WLAN corresponding to each AP transmitting power combination, and selecting an optimal power and channel configuration scheme of the WLAN, thereby improving throughput and resource utilization efficiency of the WLAN.