In this paper, the authors present the review of Intrusion Detection System (IDS) using techniques of Expert systems (artificial intelligence). With the growing need of computer networking and e-commerce, the security of the web systems are of the major concern. IDS is the one that can be used for monitoring data congestion and also recognizing the user behavior to identify the malicious attacks and also the illegitimate access of intruders. The main aim of IDS is to safeguard the data confidentiality and integrity. Using the AI techniques once the intrusion is detected it can be represented using alerts to the security officer.