A relationship was identified between the learning, knowledge and skills in providing school lunches for elementary and junior high school students and the improvement of food knowledge, food selection and food environmental setting of agricultural high school students.An agricultural high school, department of nutrition science at a university, and a school lunch center collaboratively developed an educational program. Twenty-five third-graders at a high school produced and presented tomatoes and cheese to the school lunch center which were used in school lunches provided to all elementary and junior high schools in Nayoro city. In addition, the high school students took classes and practical training on food characteristics, the process by which those foods are supplied to students as school lunches, and a balanced diet. The students then prepared school lunch newsletters which were destributed to all the schools.A before-and-after comparison with a self-answered questionnaire was used to evaluate the changes of consumer support and their knowledge, food selection, and food environmental setting in their own dietary habits. Changes in the two evaluation scores and the factors affecting these changes were analyzed. The level of consumer support of nine participants rose. The knowledge and food environmental setting of this elevated group were significantly improved. The effective factors of consumer support were indicators of their dietary habits. A relationship was therefore identified between the consumer support and improved food knowledge and food environmental setting of the agricultural high school students.