I currently have both a sharepoint 2007 farm and a sharepoint 2010 farm, both have an SSRS server.
I need to move the reports from SP 2007 to SP 2010 and I'm not sure how to do this easily.
It sounds like you have a new SSRS Server associated with your SP 2010 Farm and you'd like to move all the reports from an old SSRS Server associated with your SP 2007 Farm. If that is the case, the easiest method maybe to move the entire SSRS Database from the old server to the new one.
There is a great TechNet article on moving SQL Server Reporting Services databases to another server.
The basic summary is: