Heat exchange station quality and efficiency improving system and method suitable for low-temperature central heating system

The invention discloses a heat exchange station quality and efficiency improving system and method suitable for a low-temperature central heating system, belongs to the technical field of heat supply, and solves the problems of heat loss, difficulty in temperature raising of a low-temperature heat source and insufficient utilization of low-grade energy caused by low water supply temperature, high water return temperature and large heat load change of a building in winter of an original heat exchange station. The system comprises a main heat pump device used for processing low-temperature hot water provided by a heat exchange station to obtain high-temperature hot water and normal-temperature hot water, conveying the high-temperature hot water to a heat storage device for storage and a user side for heating, and conveying the normal-temperature hot water to the heat exchange station; the heat storage device is used for storing high-temperature hot water and conveying the high-temperature hot water to the circu