In the context of the "dual carbon" goals, designing and establishing carbon accounting technologies related to carbon trading, carbon accounting, carbon sequestration, and carbon pricing may significantly contribute to achieving the goals. Financial technology (fintech) is inclusive and innovative. So artificial intelligence, blockchain, cloud computing, big data analytics, and e-commerce under its fields will help provide methods and recommendations for designing and constructing carbon accounting technology. This paper discusses fintech and carbon accounting techniques, aiming to map the main countries, sources, and themes of relevant research based on 141 articles from the Web of Science (WoS) database. The scientific metrology analysis result shows that: scholars will pay more attention to fintech and carbon accounting technology topics. China contributed the most to research, followed by the United States. Publication sources reflect the interdisciplinary nature of research. The main research topics are blockchain, cloud computing, artificial intelligence, etc. Research hotspots mainly focus on carbon sequestration, blockchain, and carbon emissions. In short, there currently needs to be more studies on the design and creation of carbon accounting under financial technology. There are many factors to consider (such as practicality and feasibility), and there is more space for development.