The invention relates to a method, a device and a system for testing the authentication performance of network access equipment. The method comprises the following steps: storing all authentication messages transmitted by a user end and/or an authentication server end in preset time; concurrently transmitting all the stored authentication messages in the preset time to the network access equipment; and detecting the performance of the network access equipment for processing the authentication messages. The method for testing the authentication performance of the network access equipment testsauthentication performance parameters of the network access equipment for processing the authentication messages by storing the authentication messages and then concurrently transmitting the authentication messages to the network access equipment, tests the capability of the network access equipment for processing the authentication messages without using a plurality of authentication server ends, does not need to develop different simulation test software by aiming at authentication protocols between different network access equipment and authentication server ends, improves the test efficiency, prevents the delay for generating or transmitting an authentication response message caused by ageing, and the like of the authentication server ends and has high testing precision.