The invention relates to a method for baking food by utilizing solar energy. Specially speaking, the sunshine is utilized fully, light is condensed for generating high-temperature energy by irradiation, the energy is accumulated so as to increase the temperature of a baking room, the light is condensed and the heat is absorbed and accumulated by solar energy so as to heat a organic heat carrier with high boiling point and phase-changed heat carrier with low boiling point, the heat carrier with the low boiling point returns to a heat accumulating device after being heat-released and condensed by metal fin pipelines in a food baking room, the method can be applied to occasions with the baking temperature lower than 80 DEG C, is an energy-saving method by utilizing the solar energy for baking food, and belongs to the solar application in food baking field.