Anybody would like to answer this question?

My guess is that you'll need to check out which php artisan uses:

$ which php
/usr/local/opt/php55/bin/php

And then figure out where is the config files, and also how to install the xdebug extension, once it's installed and configured I guess artisan serve will automatically use xdebug (since it's in the php config) and then all you'll have to do is use PHPStorm to debug your app like you'd do with any other app (it's pretty easy once you've got XDebug working hehe)

Hope this helps, I'd also like to know a second opinion on this though.

Yeah, you must enable xdebug in the php config, then it works fine. On Windows: http://www.wikihow.com/Configure-XDebug-in-XAMPP-(1.7.2/Later)-on-Windows