FMDB Transactions on Sustainable Digital Economy (FTSDE), is a digital economy journal. Digital economy boosts economic growth, business possibilities, public services, e-commerce, and digital product delivery. Digital transformation helps Big Data propagate excellent practises. Information, innovation, and knowledge drive digital economy. Innovation improves a company's production efficiency and/or costs through organisational and procedural changes. Information, expertise, and abilities constitute knowledge. Combining an organization's existing expertise with external knowledge can lead to hard-to-copy innovations. Global scholars and governors are interested in creative knowledge dispersion in the digital economy. Innovation in the digital economy requires multidisciplinary skills in statistics, econometrics, computer science, data mining, law, and business ethics. Innovation and knowledge are key to digital economy growth and competitiveness. Digital innovation management, knowledge upgrading in industrial chain management, and other innovation and knowledge fields are covered. FTSDE encourages contributions from scholars in all fields to fill knowledge gaps and promote innovation in digital economy. Theoretical papers, empirical research, theoretical reviews, and case studies on knowledge-boosting inventions are welcome.