If you take IELTS on Computer, you will do the tests in the following order on the same day: Listening, Reading and Writing, with the Speaking test before or after this test session.
If you take IELTS on Paper, you will do the tests in the following order: Writing, Reading and Listening. Depending on the test centre, the Speaking test can be done on the same day, or up to 7 days either before or after the test date.