A fishing light cooling system, includes a cooling box made of plastic material and has a cooling box volume ； the cooling box has a cooling sink and a connecting sink ； the cooling sink has a water inlet space which is connected to a water inlet pipe and a water outlet space which is connected to a water outlet pipe ； a first connecting tube is connected between the water inlet space and the connecting sink ； a second connecting tube is connected between the water outlet space and the connecting sink ； a cooling element is disposed on the cooling box and enclosed the cooling sink and the connecting sink ； a lamp group is disposed on the cooling element and has a total power ； and the fishing light cooling system meets the following formula: 120 mW/cm3≦ total power/ cooling box volume ≦ 250mW/cm3.本發明為一種集魚燈的散熱系統，包含：一散熱箱，以塑膠材質製成並具有一散熱箱體積，該散熱箱具有一散熱槽及一連通槽，該散熱槽內具有一入水空間及出水空間，該入水空間連通一入水管，該出水空間連通一出水管，且該入水空間與該連通槽之間連通一第一連通管，該出水空間與該連通槽之間連通一第二連通管；一散熱件，設置於該散熱箱上並封閉該散熱槽及該連通槽；一燈組，設置於該散熱件上，且該燈組具有一總功率；並且，該集魚燈的散熱系統滿足下述式：120mW/cm3≦總功率/散熱箱體積≦250mW/cm3。
