Abstract: The heat source of the installation of drying room and greenhouse is from low temperature geothermal. energy (at 60-70℃ ) and solar energy. This installation is used for drying in summer and greenhouse culture in winter, being utilized all the year round. By means of forced ventilation and natural ventilation and adjusting the flow of geothennal water and the volume of fresh wind and returning wind, the rational matching and mutual complement of geothermal energy and solar energy are realized to meet the requirements of different conditions.