WP migration from subdomain to main domain

Hi all!
I have a question for you. I have a site which has a pretty nice intro on main page but now we want to set up and prepare WP and template for launch and my question is:
Can i set up my WP, theme and everything on subdomain (for example: beta.domain.com) and then somehow migrate everything from subdomain to main webpage (domain.com) without lost any settings?

I hope you can understand my question and thanks for answers!