Renewable energy is an important way to achieve green economic recovery and promote sustainable social development after the epidemic. China’s industry is developing rapidly，and there is a huge demand for energy. The contradiction between energy supply and rapid industrial development is prominent. Building a scientific renewable energy assessment system and evaluating countries and regions around the world，especially those along the “the Belt and Road Initiative”，is of great significance for China to base itself on its own resource endowment and learn from foreign development experience. This study constructed a quantifiable multi-dimensional comprehensive evaluation index system，including institutional dimension，economic dimension，technological dimensional，energy and environment dimension. The development of renewable energy in 47 countries/regions involving Asia，Europe，Africa，the Americas，and Oceania was analyzed and evaluated. The study results show that the countries/regions have a low overall grade of renewable energy development in the study period，but they see a stable，rising development trend. Typically，the countries/regions such as China Mainland，Indonesia，Pakistan，Russia，South Africa and New Zealand boast a significant growth trend in the above four dimensions. Seen from the horizontal comparison，the Americas and Oceania have the highest grade of renewable energy development，followed by Europe，with Asia and Africa ranking lowest. The Europe and Oceania’s obvious advantages in the dimensions “institutional pillar and economic pillar” are mainly contributed by their better policy environment and economic development. The high maturity of renewable energy technology in the Americas and Oceania supports their better performance in the dimension “technological pillar”. The countries with better development in the dimension “energy and environmental pillar” are distributed in Asia，Oceania and Europe.