A server cabinet is provided, which not only utilizes a first cooling fluid to flow through a heat exchanger of the cabinet to lower the temperature of entrances of fan modules without wasting additional energy, but also utilizes a cooling fluid pipe set to send a second cooling fluid to heat exchange apparatuses in a server to lower the temperature of heating elements inside the cabinet. The server cabinet could lower the heat dissipating loading of the heat exchanger of the cabinet and achieve the efficiency of saving energy.