Abstract: A method of making soymilk using a soymilk maker (200, 300), said soymilk maker comprising: a container (201, 301), a grinding device (202), a heating device (203), a level sensor (204, 304) set at the upper part of said container for detecting the liquid level of the material in said container, and a water injection device (205, 305) for injecting water into said container; which method comprises the steps of: a) grinding the material, and heating the material in said container (201, 301) by applying a first power; b) during a preset period, performing a first detection using said level sensor (204, 304); and, if said level sensor is triggered by the foam generated in the process of making soymilk, heating the material in said container (201, 301) by applying a second power, said second power being lower than said first power; c) after said first detection, performing a second detection by means of said level sensor (204, 304) after a predetermined time interval; and, if said level sensor is triggered by the