This article deals with the importance of taking the ‘ocak’ (family) system into account on the studies about the tradition or the ‘ocak’s and groups that are called as Alevi. Today the tradition that is called as Alevi have a traditional structure which constitutes an ‘ocak’ system. As a matter of fact, the examples that are widespread in Anatolia such as; Ağuçan, Baba Mansur, Hacı Bektaş, Dede Garkın, Hasan Dede, Keçeci Baba, Hubyar, Şücaaddin Veli etc. make the matter clear. All the ‘ocak’s named Alevi have chains of authorities (silsilahs or shajaras) and they are also affiliated with various Sufi orders. These differences are the main reason for the emergence of some differences about main elements among the members of the Alevi tradition. Depending on these differences, different understandings and practices have emerged in the acceptance of “Haq, Muhammad, Ali”, four doors and forty levels, manners and ceremonies/etiquettes, books about Alevi manners and ceremonies/etiquettes, ‘cem’s , ‘semah’s, mystical poems (deyiş) and musical ballads (nefes) recited during cems, social institutions such as ‘musahiblik’. The fact of organization that emerged with urbanization was formed in a framework centered on Ocak system. For this reason, it is very important that all studies about Alevi traditions and their members to take the ‘ocak’ system into account for producing healthy results. This is actually a reality that is often expressed in tradition: “One path, a thousand-one practices.”