Abstract: The growth of network bandwidth requires that intrusion detection systems (IDSs) have higher performances than ever. In this paper, two efficiency detecting approaches of IDSs are presented. One is to use an IDS traffic controller managed by an appropriate traffic control strategy to perform payload balancing; the other is to use attack level classification according to detection cost to arrange the tasks of different IDS. By using the two methods, the IDS traffic payload is balanced, resulting the increased overall detection efficiency; in addition, different IDSs are complemented each other, therefore the anti-capability of IDSs can be enhanced.