In recent years, information technologies have attained remarkable advantages in promoting the development of sustainability in agriculture. However, challenges still exist in technology implementation, which mainly involves biased points of view, initially higher costs, uncertainty, lack of transparency, and trust. To tackle these challenges, recent research attempts to introduce blockchain technology, combined with ICT, to promote sustainable e-agriculture. Blockchain technology, due to its distributed network system, is believed to enable a more transparent supply chain and rebuild trust between members. Therefore, blockchain-enabled e-agriculture is widely considered as the next step towards sustainable agriculture. Realistically, implementing blockchain technology still offers some key issues, and a new perspective about sustainable data management systems is needed. In this paper, data demands from all related parties who care about sustainability achievements in the agricultural sector are taken into consideration. The paper proposes an overall system approach to insert blockchain technology into the current agri-food supply chain. It provides interesting insights about how to achieve sustainability, by creating a new value mechanism among blockchain network members.