Systems Audit is a system of evaluating information security infrastructure against a collection of defined controls and bench mark which helps in safeguarding assets, maintaining data integrity, and operational efficiency to achieve the organization's goals or objectives.

Information system audit is important because it identifies vulnerabilities in a system and suggests the degree of variation between current organizational practices and industry bench marks. System auditing is important because vulnerabilities could be exploited by intruders or external attackers like hackers to get hold of valuable information asset of an organization.