The master's thesis "IT Support in Planning and Monitoring Maintenance of Automatic Molding and Casting Line " explores the application of information technology in the maintenance of an automatic molding and casting line in the Plamen Foundry in Požega. The thesis begins with an introduction to the Plamen company, providing basic information about its history and technical specifications. Special emphasis is placed on the importance of the maintenance department in ensuring the smooth operation of the molding and casting line. The tasks and responsibilities of this department are described in detail. Furthermore, the key characteristics of the automatic molding and casting line are presented, with a particular focus on the importance of regular maintenance of critical components such as chambers, bearings, and seals. Maintaining these components is crucial to ensuring their functionality and preventing potential breakdowns. The central part of the thesis is dedicated to the development of a maintenance plan through the implementation of the Plamen 2010 IT system. The procedures for defining maintenance activities, required capacities, and spare parts are explained in detail. A concrete example of a planned maintenance intervention, such as the replacement of chambers, bearings, and seals, is also provided. The tracking of failures and interventions through the IT program and the cooperative supervision involving collaboration with other relevant departments are described. The application of information technology enables the optimization of maintenance planning and monitoring, resulting in increased productivity, cost reduction, and improved product quality.