To provide an air conditioning mechanism of the ground environment, and particularly the air conditioning mechanism of the ground environment, circulating groundwater between the underground and the ground by solving the problem wherein when pumped underground water is discharged intact, exhaustion of underground water occurs to cause ground subsidence or sinking of ground, though recently cold and warm temperature of underground water has been utilized for the temperature control of a house, melting of the snow and greenhouse culture.

In this air conditioning mechanism of the ground environment, the underground water is circulated between the underground and the ground, and the sensible heat and latent heat of the underground water are utilized for air-conditioning the ground environment. The air conditioning mechanism of the ground environment is characterized in that the underground water returned from the ground is diffused and penetrated under the ground and returned to a pumping well for the underground water.