PROBLEM TO BE SOLVED: To effectively culture algae by efficiently utilizing exhaust gas.SOLUTION: The system comprises exhaust gas generation source 10 from which exhaust gas containing carbon dioxide is generated, a culture apparatus 30 which accommodates culture solution 40 for culturing algae and to which exhaust gas is supplied, a photosynthesis tank 50 for allowing algae to photosynthesize, and circulation mechanism 60 for circulating culture solution 40 containing algae between the culture apparatus 30 and the photosynthesis tank 50.【課題】排ガスを有効利用して藻類を効率良く培養する。【解決手段】二酸化炭素を含む排ガスが発生する排ガス発生源１０と、藻類を培養する培養液４０を収容し、排ガスが供給される培養装置３０と、藻類を光合成させるための光合成槽５０と、培養装置３０と光合成槽５０の間で藻類を含む培養液４０を循環させるための循環機構６０とを備える。【選択図】図１
