My system is using a server (PCS7-V9.2). Now, I want to build a new server(add a server). Which steps I have to do?

Thank you for your'answers.

Hello,

Do you mean you have PCS7 9.1 SP2 ?
You mean you want to add Redundant Server with the existing OS Server ? or additional OS Server(Single) ? 

You may use PCS7 Compendium part A manual for guide on configuration steps for adding/configuring additional OS Server station. I provided link below:

SIMATIC Process Control System PCS 7 Compendium Part A - Configuration Guidelines (V9.1): https://support.industry.siemens.com/cs/ww/en/view/109809015