<p>E-commerce has become a powerful disruptive force in the international economy; however, it has significant environmental impacts due to its large carbon footprint. This research paper examined how digital intelligence can help achieve sustainability through the lens of the dual carbon strategy. The research studied three countries (China, the United States and Germany), using robust methodology tools (panel vector autoregressive and difference-in-differences) to assess how technology and public policy interventions affect emissions reductions. The study found that digital intelligence significantly reduces carbon dioxide emissions; however, it framed the effects of technology and policy, which vary by country due to differences in energy policy, energy market structure, regulatory frameworks, and implementation challenges. At the same time, digital tools and legal and economic legislation tended to act against each other, with the potential to facilitate and achieve sustainability-related goals and possibilities for both industry and regulators. The study presented a complementary linking theory that connected practice in sustainability and sound reasoning and consideration for future discourse on sustainable e-commerce growth strategy in the dual carbon phase.</p>