Abstract: According to the present invention, soybean curd lees are effectively utilized, which are discharged in large quantity in the process-to produce soybean-related food products such as soybean curd (tofu), soybean milk, etc. known as superb food products containing vegetable proteins. The soybean milk (functional soybean curd lees milk) and soybean curd (functional soybean curd) both having good taste and high functions can be produced without discharging waste product and with high economic feasibility.