Taiwan’s feed-in tariff (FIT) policy, revised in 2009, sets a goal to increase the installation capacity 6,500–10,000 MW (megawatts) of renewable power systems in 20 years. The purpose of this paper is to examine whether the goal can be achieved or not. This paper presents an overview of FIT policies implemented in some leading countries and their performance of renewable electricity installed capacity and generation. This paper presents two outlook scenarios for Taiwan’s renewable power installation capacity by using Germany as a benchmark after a detailed analysis and discussion on Taiwan’s historical evolution of renewable energies. The Moderate Scenario projects that total cumulative capacity of renewable power systems increases from 5,813.8 MW in 2010 to 7,245.99 MW in 2030, while the Optimistic Scenario estimates the total renewable power capacity will be 11,977.14 MW in 2030. The total increase in the new installation capacity attain to 1,432.19 and 6,163.64 MW for the two scenarios, respectively.