This presentation explores how the green port concept contributes to sustainable blue economy development. The research defines the blue economy as the sustainable use of ocean resources for economic growth while maintaining healthy marine ecosystems, and examines how ports can minimize their environmental footprint through eco-innovation. The study outlines five core components of green ports: (1) renewable energy and efficiency through solar/wind power and shore-side electricity; (2) sustainable transport systems including electrification and intermodal freight; (3) waste management with modern treatment facilities; (4) air and water quality protection through emission reduction and ballast water management; and (5) smart port digitalisation using automation, AI, and environmental monitoring systems. The presentation features case studies from three global ports demonstrating green practices: the Port of Seattle (clean energy hubs and zero-emission infrastructure), Dar es Salaam/Tanzania (port-city partnerships for renewable energy and biodiversity), and Guangzhou Port Authority (shore power integration for decarbonised shipping).