Abstract: According to the needs of underground cooling, ice-making condensation heat recovery and water source heat pump system standby unit selection in the Wutongzhuang Coal Mine, the use of multiple-operating condition of heat pump type refrigerating unit as the refrigeration of underground local cooling well ice-making system was proposed, ice-making and heating in summer and heating in winter were achieved, and then the working principle of the system and process flow were discussed, coefficient of performance evaluation about "cooling and heating" for multi-functional refrigerant unit is proposed, and the unit performance for different working conditions were comparatively analyzed. Finally the running test showed that the system meeted the different working conditions in normal operation.