The authors have developed the Gaia Snow-Melting System, which utilizes the ground as a heat source and heat storage body. Another characteristic of the Gaia Snow- Melting System is the utilization of the Downhole Coaxial Heat Exchangers (DCHEs) proposed by the authors. In this system, solar heat absorbed in a pavement is recovered and stored in the ground over summertime. Hence, both geothermal heat and solar heat are used for melting snow in winter