The University of Sydney can change majors on campus, or change departments and majors in the same school, as long as the school agrees. The university of Sydney needs to study the main course for half a year before it can be put forward. If you have studied the main courses for less than six months and want to change your school and major, what you need to do at this time is: first, get the offer of the new school. Then notify the University of Sydney to apply for Releaseletter.

Without changing the course level, you don't need to inform the Immigration Bureau to change your major on campus, but if you graduate early or late because of changing your major, you need to pay attention to the visa terms.