This research aims to develop snow melting system around water tank for fire-protection by using heat pipe. Water in a water tank installed underground is heated by underground heat source, 10〜15 ℃. Heat is transported from water to snow melting panel by heat pipes, which melts snow. The experimental results obtained for two years show that this system can melt the snow around the steel lid in winter season preferably. The numerical simulation using only weather data was found to predict temperature variations of the whole system with good agreements to the experimental data. Therefore, this simulation software can be used for designing this snow-melting system.