SAT, also known as "American College Entrance Examination", is a standardized written test of academic ability of high school graduates sponsored by American College Board. Its achievement is an important reference index of academic ability for high school graduates from all over the world to apply for admission qualifications and scholarships in American higher education institutions.

The total score of SAT 1600 is divided into three parts: reading (400 points), grammar (400 points) and mathematics (800 points), and the total score of composition (test selection) is 24 points (reading comprehension 8 points, article analysis 8 points and English writing 8 points).

Educational testing service (ETS) is authorized to be responsible for the proposition and scoring of SAT. There is no official validity limit for test scores, but some community colleges only recognize SAT scores within two years as valid scores.

All colleges and universities in the United States recognize SAT scores, but not all universities require them. Some institutions do not need to provide admission requirements, and students can use other grades instead. When applying for a university, they need to carefully check the admission requirements of the school.

When applying to most American universities, you must provide SAT scores, or equivalent American university exam scores.