Abstract: In the study of network security,cyber-attack case plays an important role for effectively analyzing and defensing network illegal intrusion．However,how to effectively build cyber-attack case base is one of the difficulties．For there is no perfect cyber-attack case base,this paper studied the cyber-attack case model based on ontology．This paper first defined formalized representation of cyber-attack case,classified cyber-attack case domain knowledge,and on this basis,applying ontology,the knowledge sharing tools,built a sharing,reusable,scalable cyber-attack case model,finally,using the model of cyber-attack case put forward based on ontology,realized knowledge acquisition of a network attack events,to verify the validity of the model.

Key words: Cyber attack,Case presentation,Ontology,Case base model