In this paper, the authors discussed a methodology of applying artificial intelligence into intrusion detection using snort system. Intrusions detection systems (IDSs) are systems that try to detect attacks as they occur or after the attacks took place. Hybrid Snort system is proposed for network security. A brief overview of Intrusion Detection System (IDS), snort, artificial intelligence and related detection techniques are discussed. The purpose of this paper is to describe some new ideas in intrusion detection system.