Where is the bookmarks of the safari ?

After new Mac os X system installed in the Macinosh HD, the previous Mac os X system is all achieved in to a file "Previous system" in the Macinosh HD. 

If you did not extract the bookmarks before the installation, you have to find the old useful Bookmarks in the previous system and add them to Safari:

For Safari under Mac os X, replace the Library/Safari/Bookmark.plist with the old one. The old but useful Bookmark.plist location:
/Macinosh_HD/Previous_system/User/username/Library/Safari/Bookmark.plist
If you want to extract Bookmarks to other bowsers, this Bookmark.plist is not useful, but .webachieve files are need.Those files are under:
/Previous_system/User/username/Library/Caches/Metadata/Safari/Bookmarks 

The Metadata directory also includes the Bookmarks of Camino and data of iCal.