A method for removing protein from a food includes adding a first group of enzymes into a food while cooking the food. The first group of enzymes decomposes protein in the food in a first enzyme reaction. Let a mixture of the first group of enzymes and the food rest after cooling the mixture to a temperature below 45° C. Then, the mixture is boiled to terminate the first enzyme reaction. A second enzyme is added into the mixture after the boiled mixture is cooled to a temperature below 45° C., and let mixture of the first group of enzymes, the food, and the second enzyme rest. The second enzyme carries out a second-stage decomposition of protein in the food in a second enzyme reaction. Then, the mixture of the first group of enzymes, the food, and the second enzyme is boiled to terminate the second enzyme reaction.
