The heating problem in the alpine area of western China hasn’t been solved. Based on the building characteristics of small volume and low groundwater level in this area, the author proposes a heating technology scheme that uses inter-temporal heat storage of building foundation and relies on renewable energy to solve the heating problem in alpine regions. Taking a low-rise residential building in Daocheng County, Ganzi Prefecture, Sichuan Province as the research object, the Characteristic Temperature Method was used to simulate and analyze the dynamic heat load and daily heat demand of the building. Based on the daily characteristics of solar energy, an inter-temporal heat storage system for building foundation soil was constructed. The model is to study the optimisation of the inter-temporal foundation soil heat storage unit and the matching of load demand, heat storage volume and solar collector area in meeting the heating demand of the building. The results of the research indicate that the inter-temporal heat storage system for building foundation has strong feasibility and application prospects in the alpine area of western China.