Network traffic detection method, system, equipment and controller

Disclosed are a network traffic detection method, system, equipment and controller. The method comprises the steps of receiving messages of a first data stream sent by a first switcher by using the detection equipment; carrying out security detection on the messages of the first data stream according to a set security rule to obtain detection results; and sending the detection results to the controller, so that the controller can generate a new transmit rule according to the detection results to replace a temporary transmit rule of the first switcher. The controller can firstly direct the to-be-transmitted data stream of each switcher to the detection equipment and determines whether to transmit the data stream or not among the switchers according to the security detection results for each data stream of the detection equipment, thereby improving accuracy of network traffic detection and increasing transmission performance of the network.