The Information Age emphasizes the application of information technology and highlights modern technological innovations in industry development and construction. As representative institutions in the accounting industry, accounting firms, by leveraging information technology to build intelligent audit systems, can not only meet the industry development requirements of the institutions but also enhance their audit efficiency and provide scientific and comprehensive audit services for complex and large-scale engineering projects. Therefore, research on the construction of intelligent engineering audit systems for accounting firms in the Information Age begins from the perspective of the times. By analyzing relevant domestic and international literature, it grasps the current research status of the subject, clarifies the research direction and content; it elaborates on the construction of intelligent engineering audit systems for accounting firms to refine the research content; and finally, it adopts a case study approach to analyze the application value of intelligent engineering audit systems for accounting firms, ensuring that the research demonstrates strong practical value and can provide reference and guidance for similar studies.