A modular closed breeding system includes a house unit, at least one bearing device, a first exhaust device, an oxygen supply device, and a second exhaust device. A poultry breeding room, an air treatment room, a first air exchange room and a second air exchange room in the house unit together form a closed circulation space. The carrying device is suitable for livestock activities. The first exhaust device and the second exhaust device are used to circulate the gas in the closed circulation space. The oxygen supply device includes a first oxygen supply module and a second oxygen supply module. The first oxygen supply module and the second oxygen supply module use algae photosynthesis to convert carbon dioxide produced by livestock into oxygen and send it to the poultry and livestock breeding room.一種模組化密閉式養殖系統包含一屋舍單元、至少一承載裝置、一第一排風裝置、一氧氣供應裝置，及一第二排風裝置。屋舍單元的一家禽家畜飼養室、一空氣處理室、一第一空氣交換室及一第二空氣交換室共同形成一封閉式循環空間。承載裝置適用於供家畜活動。第一排風裝置與第二排風裝置用以使封閉式循環空間中的氣體循環流動。氧氣供應裝置包括一第一氧氣供應模組及一第二氧氣供應模組。第一氧氣供應模組與第二氧氣供應模組藉由藻類行光合作用使家畜產生的二氧化碳轉換成氧氣傳送回家禽家畜飼養室。
