How to implement multi sites structure in different server

One website need to be developed to show the luxury products. One main drupal system has been installed successfully. And it has several different Sub Brands under the main drupal server, here we suppose the sub brands’ name are sub1 and sub2. Each sub brand should has its own sub site (sub site1 and sub site2). The Main Drupal system in one Server1, meanwhile all other sub brands’ sites are in the other server, we called it as Server2 here.

So what we want is, the admin of each brand can log into main drupal system to do configuration for and only for their own Brand site. They can configure the menu, the policy, the contents and template, etc for their sub brand site. After configuration in main drupal system, the result should be displayed in the sub brand site on server2. This is with high efficiency because through one main drupal system, we can deploy several sub sites.

Well, I am not sure whether my description was clear or not. I hope to know whether there has any extension module in drupal that can make all above available? And is multi-site also useful?

Many many thanks to anyone who can provide any suggestions!!