I'm currently user Entrust for Roles and Permissions. However, few days ago, my friend give a link about Laravel Authorization https://laravel.com/docs/5.1/authorization. I am so confused that which one of themes should I choose for my project?
You'll probably end up just writing your own version of Entrust - so you might as well stick with it :-) If you're doing a new project or have some different requirements then maybe look at laravel's built in stuff.