Wireless network channel assignment method, device, and system

The embodiment of the invention provides a wireless network channel assignment method, device, and system. The wireless network channel assignment method comprises that a centralized controller receives signal interference information interfered with by an adjacent AP and reported by at least one AP in a preset domain; that the centralized controller receives load information reported by the at least one AP; that the centralized controller determines comprehensive interference values of the APs according to the received the signal interference information reported by the APs in the at least one AP and the load information of the APs; that the centralized controller determines the target channels of the APs according to the comprehensive interference values of the at least one AP, and transmits the indicative information of the target channels of the APs to the APs. The wireless network channel assignment method achieves more reasonable wireless network channel assignment and especially optimizes channel assignment in dense placement scenes.