The purpose of the study is to improve the nutritional status of esophageal cancer patients undergoing concurrent chemoradiotherapy by the personalized nutrition counseling.Dietitians consult with participants which invited to be the experimental group and follow up weekly through communication software (Line) or telephone remote methods. Dietitians provide the dietary advice base on the guidance of the cancer diet principles, and give on assessment and diet adjustments. At the same time, Under the same condition of nutritional supplements in both the experimental group and the control group, the investigators explore the changes in the quality of life and nutritional status of the subjects by evaluating with the nutrition Index (PG-SGA) and quality of life (EORTC QLQ-C30 questionnaire Taiwan version) questionnaire evaluation and recode the basic physical data, including body weight, grip strength, body muscle fat composition. Therefore, investigators conducted this study to appoint dietitian to arrange personalized nutrition consultation for esophageal cancer patients to improve the nutritional status of these patients.