There is no in-place upgrade from Configuration Manager 2007 to Configuration Manager (current branch). Also, the Windows Server infrastructures that support Configuration Manager 2007 are Windows Server 2008 and 2008 R2. And typically, the Microsoft SQL Server versions that are used are SQL Server 2008 and 2008 R2. Considering this, it may require lots of planning and work to bring your infrastructure (Windows Server and SQL Server), and then Configuration Manager, up-to-date.
We recommend that you migrate to current product versions before support ends. This lets you take advantage of the latest product innovations and makes sure that you receive uninterrupted support from Microsoft.
If you have a Premier Support agreement, contact your account team to develop a migration plan. If you don't have a Premier Support agreement or an agreement with an existing solution provider, you can find one at Enterprise Mobility + Security Solution Providers.
For more information about the migration, see the following: