There are a number of different types of Australian immigration, classed under different categories of visa.
Employment visas - Australian working visas are most commonly granted to highly skilled workers. Candidates are assessed against a points-based system, with points allocated for certain standards of education. These visas are often sponsored by individual States, which recruit workers according to specific needs. Visas may also be granted to applicants sponsored by an Australian business. The most popular form of sponsored working visa is the 457 visa.
Student visas - The Australian Government actively encourages foreign students to study in Australia. There are a number of categories of student visa, most of which require a confirmed offer from an educational institution.
Family visas - Visas are often granted on the basis of family ties in Australia. There are a number of different types of Australian family visas, including Contributory Parent visas and Spouse visas.
Investor visas - Foreign investors could invest the business or fund in Australia to acquire the Permanent Residential of Australia, after 4 years (including the year which acquire the visa), they need to take the exam and make a declaration in order to be a citizen of Australia