Sports dietitians apply diet care management methods implemented in clinical practice, which have done based on paper media. However, as athletes increase, it becomes difficult to deal with many of players with the paper media. To cope with the problem, it is needed to simplify operations to support a large number of players, and to valorize this sports dietics activities. We found that the problem can be solved by using information science. The basic framework of the support Web system is created by students and teachers of the local technical high school rugby club. In addition, it is used to measure the degree of retention of players and to analyze athletes' words for the purpose of mental care with KH Coder.