The invention discloses a method and a device for monitoring pseudo wireless APs (access points). According to the method, the pseudo APs are monitored by each legal AP deployed by an operator in the following steps of deploying a plurality of legal APs managed by the operator by adopting a honeycomb type networking scheme, and ensuring that each legal AP works on an appointed channel and scans beacon frames sent by nearby APs while transmitting data; extracting the scanned AP information from the acquired beacon frames; comparing the extracted AP information with a legal AP information databank, wherein the legal AP information databank stores information of the legal APs; when the extracted AP information is not in the legal AP information databank, judging the scanned APs as pseudo APs. By adopting the method and the device, the pseudo APs can be monitored seamlessly on a large scale and powerful support is provided for solving the pseudo AP safety problem faced by carrier-class APs.