We investigated the energy consumption of heat source equipment in the university research facility building. The purpose is to clarify the current operation state of the heat source facility and propose a more efficient heat source facility system at the time of renewal. The survey method used BEMS data to calculate every hour of COP used by the heat pump of electric energy, inlet and outlet temperature and primary pump flow rate. As a result, the heat source efficiency of the heat pump had an the average COP=1.98 during cooling in 2016 and COP=1.98 during heating in 2016.The heat source efficiency at the time of designing the heat pump was COP=2.38 during cooling and COP=1.95 during heating. Therefore, it was revealed that the heat source efficiency average in 2016 was lower than the heat source efficiency at the time of designing the heat pump. Also, energy simulation of the target building was carried out and the energy consumption was estimated. As a result, we grasped the detailed energy consumption of the target building.