The invention belongs to the technical field of food additives, and in particular relates to a sorbitol concentration system and method. The sorbitol concentration system of the present invention comprises a single-effect concentrating tank, a single-effect post-regulating tank and a finished product accommodating device connected in sequence; the bottom of the single-effect post-regulating tank is provided with an outer coil; a discharge port of the single-effect post-regulating tank is provided with a jacketed valve; a pipe connected between the single-effect post-regulating tank and the finished product accommodating device is provided with a jacket. By heat preservation treatment, the product can be prevented from blocking pipes and the accommodating tank due to freezing at a too low temperature. In the concentration process, the sugar content is directly detected by a sugar meter for moisture control, and the relationship between the sugar content and the moisture is obtained. A moisture result can be reported within 5 minutes, thus the moisture detection time is greatly shortened, the production efficiency is improved, and the product quality is stabilized. The concentrationmethod of the invention can effectively obtain high-concentration 4 sorbitol at a concentration of 95% to 97%.