Your wording is a little off but I'm assuming you want to know how to import one of your Teambuilder teams into dynasty mode?
If so, you will first have to download the team. I'm at work and don't have access to the game but you can find where to do that on the main menu.
-Then, you will have to start up a new dynasty
-There is an option during setup for "Custom Conferences" and "Import Teambuilder Teams" press the button that it tells you to go to that option.
-Select the team that you downloaded in the first step and select a current FBS team that you wish to replace said team with.