It’s fact that the hadith variants had increased with various reasons after the Prophet. Our scholars tried to understand the hadiths evaluating hadiths variants together. The advantage of evaluating hadiths variants together is utilized both in the variant and in the text. The variant evaluation by collecting hadiths is very important in the point of wiev of reliability of variant. The evaluating of text with the same manner is also generally get easy the understanding of the text. Because, it’s known that the hadiths explain each other. Indeed the result of evaluating hadiths which has different variants get provided the better understandihg of hadiths. Considering these facts we can say that usûl-i hadith based on the basis of evaluating hadith variants together and it isn’t overstated as well.