The implementation of digital technology in the maritime and port industries has significantly enhanced energy efficiency and reduced carbon emissions. Technologies like digital twins and predictive analytics enable real-time energy monitoring, allowing ports to identify inefficiencies and optimize operations, resulting in up to 25% energy savings in specific cases. Additionally, these technologies support compliance with international environmental regulations, such as IMO 2020, which sets strict limits on sulfur and carbon emissions. Beyond operational and environmental benefits, investments in digital technologies deliver long-term financial gains by reducing operational costs and enhancing efficiency. However, challenges remain, including high initial implementation costs, infrastructure requirements, and cybersecurity risks. Integrating renewable energy sources like solar and wind power strengthens sustainability strategies, making port operations more environmentally friendly and energy-efficient.