A water-cooling fan comprises a chassis unit, a flow guiding unit, a water cooling unit, and a purification unit. The chassis unit has an air inlet and an air outlet. The flow guiding unit is configured to form a blowing airflow and includes a rotating member rotatably disposed in the casing unit, and a driving member for driving the rotating member. The water cooling unit includes a first water curtain disposed between the air inlet and the rotating member, a water storage tank for storing water and disposed in the chassis unit, and a water storage tank The water is delivered to the first water curtain and wets the water supply device of the first water curtain. The purification unit is for purifying water of the water storage tank and includes an ozone generating device for generating ozone, and a vent pipe connected to the ozone generating device and extending to the water storage tank.一種水冷扇，包含一機箱單元、一導流單元、一水冷單元，及一淨化單元。該機箱單元具有一進風口，及一出風口。該導流單元用來形成一吹氣氣流且包括一可轉動地設置於該機箱單元內的轉動件，及一用來驅動該轉動件的驅動件。該水冷單元包括一設置於該機箱單元且位於該進風口與該轉動件間的第一水簾、一用來儲水且設置於該機箱單元內的儲水槽，及一用來將該儲水槽的水輸送至該第一水簾且濕潤該第一水簾的送水裝置。該淨化單元用來淨化該儲水槽的水且包括一用來產生臭氧的臭氧產生裝置，及一連接於該臭氧產生裝置且延伸至該儲水槽的通氣管。
