The effects of strategy on the network security defense and the related research on intrusion response strategy are briefly presented,with the focus on the status and function of intrusion response strategy in the intrusion response decision-making.Some specific response strategies for specific response goals are presented as well The relevant knowledge of the planning,and a classffication of response tasks are proposed.The intrusion response planning methods and models based on hierarchical task network ( HTN ) are described in detail.On this basis,the model of combining the response measure decision-making with the response time decision-making is expounded.The proposed model can integrate response strategy into response decision-making mechanism.In addition,the results of the intrusion response experiments are provided to verify the ability of using different response strategies to achieve different response goals.At last,the application needs of response strategy in network security are analyzed,and the approaches of the response strategy applied in intrusion response system are summarized.