Abstract: In order to ensure the required stable temperature of methane anaerobic fermentation in the northern alpine regions, taking many factors such as the cost of biogas production and energy balance into account, this paper proposed a new heating and warming model. The model took biogas produced by its own system as fuel and took gas hot water boiler as heat source. Fermentation liquid was heated when flowing through the water-fermented liquid heat exchanger. With Wilson Graphic method, the paper studied the heat transfer characteristics of water-fermented liquid in immerse coil heat exchanger and got variation of several parameters, such as surface coefficient of heat transfer of water in heat exchanger and fermented liquid in pipe. The results can provide theoretical references for structural design of immerse coil heat exchanger of heat fermentation liquid.