A microalgae culture system comprises a light-emitting module and a culture module.The culture module has a plurality of culture units.The culture units are arranged around and around one of the light-emitting units of the light-emitting module.Each culture unit has a culture tank.A liquid inlet pipe and a gas inlet pipe,The liquid inlet pipe and the air inlet pipe are respectively arranged at the top and bottom of the aquaculture tank.The tank is used to hold a mixed liquid.The mixture comprises a microalgae and a nutrient solution.The culture liquid enters the culture tank through the liquid inlet pipe.A gas enters the culture tank through the air inlet pipe.In which the gas forms gas lift phenomenon in the mixed liquid, so that the mixed liquid circulates in the breeding tank.一種微藻養殖系統包含一發光模組及一養殖模組，該養殖模組具有複數個養殖單元，該些養殖單元設置於該發光模組之一發光單元四周並環繞該發光單元，各該養殖單元具有一養殖槽、一進液管及一進氣管，該進液管及該進氣管分別設置於該養殖槽之頂部及底部，該養殖槽用以容納一混合液，該混合液包含一微藻及一養液，該養液經由該進液管進入該養殖槽，一氣體經由該進氣管進入該養殖槽，其中該氣體於該混合液中形成氣舉現象而使該混合液於該養殖槽中循環流動。
