Google Earth To Autocad
If you just need a background image to trace over or show site context, this is the quickest method. Note that this usually brings the image in flat (2D), without elevation data.
This is where the real power lies. If you need a 3D mesh or contour lines of your site, you will need a plugin or a dedicated tool. Standard AutoCAD cannot natively extract the 3D data from Google Earth. google earth to autocad