The Economic Order Quantity (EOQ) method is known as an efficient approach to optimizing inventory by minimizing total inventory costs, including holding costs and ordering costs. In this research, we focus on implementing EOQ in system related to heavy equipment spare parts units, with a web-based approach to facilitate information access and management. This application is designed to monitor and manage spare part inventory effectively, increase management efficiency and reduce the risk of stock shortages. We investigate how implementing EOQ can improve inventory control and optimize order cycles, so organizations can avoid high costs associated with excess or shortage inventory. In addition, this research includes a performance evaluation of web-based application that utilize the EOQ method in the context of heavy equipment units. The results of this research can make a positive contribution to the development of inventory management system, especially for heavy equipment unit, by integrating EOQ principles in a web-based environment. The implementation of this method is expected to bring significant benefits in improving operational efficiency and inventory management in various industries that use heavy equipment units as critical assets in their business processes.