Abstract: An immersion cooling apparatus and method are disclosed for automatically controlling the level of a non-conductive immersion cooling fluid in a main tank by supplying and discharging the fluid via a buffer tank. In one embodiment, the apparatus may include: a main tank configured to perform immersion cooling using the non-conductive immersion cooling fluid; a buffer tank configured to store the non-conductive immersion cooling fluid; a piping unit comprising one or more pipes configured for fluid transfer between the tanks; a sensor unit comprising one or more sensors configured to measure the level of the non-conductive immersion cooling fluid; and a control unit configured to control fluid transfer between the main tank and the buffer tank based on sensor information received from the sensor unit.