This paper analyzes Vietnam’s current legal framework for data governance and digital asset regulation, while exploring the potential for the formation of “green digital rights,” a novel interdisciplinary concept at the intersection of environmental sustainability, digital innovation, and legal theories of property rights. Through a legal-economic lens, the study assesses how the recognition of digital assets can incentivize environmentally friendly business models and financial instruments. Empirical analysis, based on a detailed case study in Khanh Hoa province, reveals both opportunities and persistent legal gaps in high-tech marine aquaculture and smart urban development. The research findings indicate that while the recognition of data as a digital asset opens prospects for green finance, significant legal gaps persist in environmental data governance and the application of digital assets to sustainable development sectors. Policy recommendations derived from this analysis include enhancing regulatory clarity, implementing legal sandboxes to foster innovation, improving environmental data standards, and strengthening institutional capacity. This study not only provides actionable policy recommendations but also contributes to deepening the theory of sustainable digital governance and property rights in the context of the twin transition.