The utility model discloses an electrical -power maintenance ERP system service utensils heat radiation structure, including the server rack, be equipped with the draw -in groove on the both sides wall in the server rack, the joint has a water -cooling piece in the draw -in groove, and water -cooling piece upper end is equipped with semiconductor refrigeration chip, evenly is equipped with a plurality of baffles in and, is equipped with water supply connector and water connectors on this water -cooling piece, hose intercommunication miniature pump in the water supply connector, the fixed intercommunication water connectors's in water tank upper end hose. The utility model discloses the structure is with water in through the defeated cold piece of intaking of hose under miniature pump's effect, through processings of cooling down of the water of semiconductor refrigeration chip in to the water -cooling piece, and the diaphragm structure through the S type, can improve the mobility of water in the water -cooling piece, make water in to the server rack mainboard dispel the heat, then water again from the water connectors end through in the hose to re -enter the water tank, carry out circulative cooling and dispel the heat.