本研究在探討目前世界兩大再生能源主流推廣制度,饋網電價制度(Feed in tariff)和再生能源配比義務制度(Renewable portfolio standards)中的FIT制度,也是所謂的躉購制度。再進行各國制度之間的國際比較,看看各國制度間的差異,發現現在大多數的國家還是以發展FIT制度為主,只有韓國是棄FIT制度轉而採用RPS制度。在各國太陽能躉購價格與現況發展的比較則發現台灣由於有在發生太陽能裝設問題前就修改制度,因此沒有產生爆量的問題且在比較每平方公里的裝設量上也不遜於其他國家。但在未來的裝設上須考慮自身國土可以承受的數量而不是一味的提高未來目標量。;This study explore one of the two important renewable energy promotion systems of the world, the feed in tariff system and the renewable portfolio standards system, FIT system, also called the wholesale purchase system. Then making international comparisons between national systems and finding differences between national systems, and found most of the country now is to develop the FIT system, only South Korea is transfer from the RPS system to the FIT system. To compare the FIT price and the developing situation, since Taiwan had modified the system before the problem of explosive question of quantity, and comparing the amount of solar installation per square kilometer is not inferior to other countries. But in the future should consider the installation itself can bear of nation land rather than to increase the amount of future goals.