The undergraduate academic system in the United States (obtaining a bachelor's degree) has no fixed number of years, but generally speaking, the academic system is four years, and different institutions have different academic year standards. The application for undergraduate study in the United States is based on the credit system. Simply put, it is possible to graduate after completing 144 credits. You can't graduate if you don't have enough courses, with an average of 15 credits per semester. If you take three credits in one course, you can take five courses each semester. This 144 credit refers to the sum of all the credits you have studied in four years, including the credits required by your major, the credits for public courses and some other credits. The other part can learn courses that interest them.

The undergraduate education system in the United States is generally four years, but because American universities usually adopt the credit system, they can graduate in three years. American schools define their own school year, so different schools have different meanings of the school year.

The education system of American undergraduate universities is very flexible. In the first year, it is generally not necessary to determine the undergraduate major of American universities. Students can try different subjects more, so as to find their real interests. American universities are all practice-oriented, and generally help students to practice in enterprises from the beginning of their junior year. Because of this, students who graduated from better universities in the United States can generally find good jobs and adapt to the company environment quickly. In addition, during the study period, the school will provide students with a lot of practical training opportunities, such as student associations, various performances, voluntary activities, company internships and so on. Participating in these activities requires students to have certain interpersonal skills.