As a clean and efficient secondary energy source, hydrogen energy is regarded as an important thrust to achieve energy transition with its advantages of abundant resources and no pollution to the environment. The research papers on the economics of electro-hydrogen coupling projects included in the WOS database from 2016—2022 were used as a statistical source and bibliometric analysis was conducted with the help of COOC and VOSviewer software to analyze the research hotspots and make research outlook in the field of economics of electro-hydrogen coupling projects research. The results show that the research hotspots are mainly focused on hydrogen production from renewable energy sources, hydrogen storage, levelised cost analysis of hydrogen energy application systems, optimal system cost solutions and project economics considering green certificates. The future trends in the study of the economics of electro-hydrogen projects are: (1) the economics of integrated energy storage/hydrogen refueling stations in the transport sector; (2) the economics of renewable energy hydrogen production in the ammonia, methanol, coal-to-oil and metallurgy industries; (3) the impact of different carbon emission reduction incentives on the economics of electro-hydrogen coupling projects.