To provide technology for collecting geothermy using a concrete pile buried in the ground and utilizing the same as a heat source for snow melting and heating, more rationally utilizing the geothermy in a deep place in the ground by more economical equipment in view of the situation where water is intermittently used in a snow melting device and a water feeder for a general home.

In one or two or more pile-like concrete blocks connected to each other in the longitudinal direction, a long container 4 elongated in the longitudinal direction of the pile is formed, geothermy is transferred to water stored in the long container through a concrete skeleton 1, and water heated or cooled by geothermy is intermittently used or circulated. The quantity of water stored in the pile can be increased, and the blocks are connected to each other, whereby the pile can be driven to a deep place in the ground.