A wireless network fault diagnosis method, comprising: receiving (101, 201), by a network management server, sampling data of user equipments in at least one area in a wireless network, wherein the sampling data is sent by a collection server; or collecting, by the network management server, sampling data sent by the user equipment in the at least one area in the wireless network, and wherein the sampling data comprises attribute information of the user equipments and corresponding probe-collected information of the user equipments, and wherein an address of the network management server or an address of the collection server is carried in an Extensible Authentication Protocol, EAP packet which is sent from an authentication server to the user equipment after the user equipment is authenticated successfully, wherein the EAP packet is an EAP packet whose extended code type is success and the address of the network management server or the address of the collection server is used for the user equipment to send the sampling data to the network management server or the collection server; generating, by the network management server, according to the sampling data of the user equipments in the at least one area, statistical information that is corresponding to each area of the at least one area; and performing (103, 203), by the network management server, area-based wireless network fault diagnosis according to the statistical information that is corresponding to each area of the at least one area; wherein the probe-collected information comprises at least one of: a fault type of the user equipments, and wireless signal quality information of the user equipments; and the attribute information of the user equipments comprises at least one of: an identifier of an area in which the user equipments are located, and identifiers of the user equipments. receiving (101, 201), by a network management server, sampling data of user equipments in at least one area in a wireless network, wherein the sampling data is sent by a collection server; or collecting, by the network management server, sampling data sent by the user equipment in the at least one area in the wireless network, and wherein the sampling data comprises attribute information of the user equipments and corresponding probe-collected information of the user equipments, and wherein an address of the network management server or an address of the collection server is carried in an Extensible Authentication Protocol, EAP packet which is sent from an authentication server to the user equipment after the user equipment is authenticated successfully, wherein the EAP packet is an EAP packet whose extended code type is success and the address of the network management server or the address of the collection server is used for the user equipment to send the sampling data to the network management server or the collection server; generating, by the network management server, according to the sampling data of the user equipments in the at least one area, statistical information that is corresponding to each area of the at least one area; and performing (103, 203), by the network management server, area-based wireless network fault diagnosis according to the statistical information that is corresponding to each area of the at least one area; wherein the probe-collected information comprises at least one of: a fault type of the user equipments, and wireless signal quality information of the user equipments; and the attribute information of the user equipments comprises at least one of: an identifier of an area in which the user equipments are located, and identifiers of the user equipments.