Both ACT and SAT are called "American College Entrance Examination". They are not only one of the admission conditions of American universities, but also one of the main bases for universities to grant scholarships, and are the test standards of students' comprehensive ability. This exam is also recognized by many American universities, but most of them are in the midwest.

Different from SAT, ACT test is more like a subject test, which emphasizes candidates' mastery of course knowledge and also gives consideration to the test of candidates' independent thinking and judgment ability. From the difficulty point of view, ACT is easier than SAT, especially for domestic candidates, it may be easier to get relatively satisfactory results in a short time by choosing ACT.

There is no distinction between I and II in the ACT exam. Including mathematics, English, reading and scientific reasoning. What is worth mentioning here is scientific reasoning, which integrates high school physics, chemistry, biology and other disciplines into a test paper and appears in the form of reasoning questions. The way of setting questions is flexible, which tests the mastery of high school knowledge and logical ability. "ACT plus Writing" adds 30 minutes of composition test on the basis of the above four subjects. All four-year colleges and universities in the United States accept ACT scores. Because ACT is a course-based exam, many universities that require SAT subject exams will completely or partially exempt ACT candidates from relevant requirements.