In order to make the most of rich underground thermal energy,fully implement energy saving and emission reduction,a mine uses high and new technology to realize comprehensive utilization of remaining heat in mine water and air return.The paper in detail introduced the composition,working principle and equipment selection of water source thermal pump,analyzed the features and economics of remaining heat utilization.The remaining heat in mine water and air return is used to build the surface heat supply system,the bath water heating system in employees’ bathroom,and the shaft warmth keeping system,realizing the goal of energy saving and emission reduction,cost-effectiveness,and environment pollution mitigation,meeting the demand of heat supply in winters and cooling in summer.