How can I become an Australian citizen after marrying an Australian daughter-in-law in Australia?

After marriage, you must first apply for spouse reunion immigration (domestic 309 visa, Australian 820 visa), which is a temporary green card resident (TR) visa valid for two years. After two years, the immigration visa officer will check whether your marriage is stable, and then turn it into a real Australian green card visa (309 visa to 100 visa, 820 visa to 80 1 visa).

Hold a green card for another year, and if you don't leave Australia within two years after TR, then you must have met the conditions for applying for naturalization for four years and three years. At this time, you can submit a naturalization application and wait for the local district Committee to inform you of the time schedule for taking the collective oath after passing the naturalization examination.

You will become an Australian citizen after taking the oath, so it will take you at least three years to complete the whole process. If you leave Australia halfway, you have to extend it accordingly. There is no immunity this time.