To address environmental regulations on greenhouse gas emissions and depletion of fossil fuels, many countries around the world are actively promoting electric vehicles. The penetration rate of electric vehicles, however, is different in each country. What are the causal conditions of EVs adoption? To answer the question, the fuzzy-set qualitative comparative analysis methodology, fsQCA, is employed to compare the factors affecting the deployment of electric vehicles and to draw policy implications for promoting the deployment of electric vehicles. In conclusion, some effective policies, such as tax exemption, purchase subsidies, are summarized. And it can be seen that there is no single effective policy tool or the circumstances of the countries for electric vehicle supply. Therefore, in order to promote the diffusion of electric vehicles, it is necessary to promote an effective policy mix considering the circumstances of the countries concerned.
