Install a brand new Mac OS X

1. Download Mavericks from App Store.

2. Prepare your USB with at least 8G capable, format it as Mac OS Extended (Journaled).

3. After download, run this command in shell:

sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointeraction

4. Reboot your Mac and hold the option, then select your USB.


5. Format your Mac's disk and install.

And enjoy.

Reference:
http://www.techrepublic.com/blog/apple-in-the-enterprise/how-to-create-a-bootable-usb-to-install-os-x-mavericks/
http://forums.macrumors.com/showpost.php?p=18081307&postcount=3