PROBLEM TO BE SOLVED: To provide a snow-melting system which is capable of performing snow-melting flexibly correspondingly to the amount of snowfall and effective for cost reduction by improving energy saving.SOLUTION: The snow-melting system comprises: a defrosting fluid distribution pipe installed in a roof top part of a structure; a defrosting fluid circulation unit for circulating a defrosting fluid to the defrosting fluid distribution pipe; a heat radiation plate installed on the surface of the roof and melts snow; a fluid supply pipe which is connected between the defrosting fluid circulation unit and the defrosting fluid distribution pipe and supplies the defrosting fluid to the defrosting fluid distribution pipe; and a fluid collection pipe which collects the defrosting fluid. The defrosting fluid circulation unit includes a defrosting fluid pump which supplies the defrosting fluid, and a ground heat absorption exchanger which is connected to the defrosting fluid pump and installed underground for he
