My brother became an American citizen in 2005 and now wants to immigrate. How to do this? Or let my parents do it first, and then their relationship will be done?

First of all, is it your own brother? If so, the current progress is 1 1 year.

Secondly, what do your parents do? Suppose parents are green cards, which are divided into two categories: whether they are below 2 1, below 2 1 for three years, and above 2 1 for eight years.

Suppose it's your own brother. If your parents don't have American status, apply for 1-2 years, and then apply for you. Time depends on it.