This study investigated the connection between economic mathematics textbooks and economic textbooks learned in high school in the 2015 revised curriculum.Economic mathematics is a newly emerging career elective course in the 2015 revised curriculum and aims to understand economic phenomena around life, solves real-life economic problems using mathematics, understands the value of mathematics, and develops the ability to make decisions reasonably. Through this study, we would like to help students achieve this goal. In addition, through the connection between mathematics subjects and other subjects, students who usually have a negative view of mathematics can change positively, and it can arouse interest in mathematics by showing that mathematics is used in real life.Therefore, I would like to investigate what are the common contents of the 'Economic Mathematics' textbook and the 'Economic' textbook and what characteristics each has.As a result, it could be seen that economic textbooks focused on understanding and utilizing the contents of the economy if the contents of the economy were understood through the use of mathematics in economic mathematics textbooks.Accordingly, classes and learning materials that combine economic mathematics and economic subjects can have a positive effect on students, so teachers need to continue to pay attention.materials that combine the two subjects.