Renewable energy source is an important step in the exploration and development on energy in human history, and Germany is the earliest one to explore and develop the renewable energy, it is now in the leading position in the whole world. The purpose of this paper is mainly to analyze the field of renewable energy developments in Germany as well as the advantages of the German renewable energy industry. Let’s take two cases as “Freiburg” and “Offshore wind farm” to study the industries of solar energy and wind energy in Germany. Hopefully, it may stir the sparkling for Macau in the renewable energy field by studying it in Germany. In this process, we will further explore the relationship between government and the renewable energy promotion, the implementation of relevant laws and regulations and peoples’ options and suggestions related to the renewable energy. Development of renewable energy in Germany is developing rapidly, and one day, the renewable energy will replace the traditional energy sources in the future in Germany.