Seeking a methodological explanation for the status of the old and new testament in the Qur'anic interpretation process, this article at first follows the semiotical model of 'Intertextuality'. Based on this model; every text is founded upon earlier texts. Thus, the very existence of a text, its background and the prevalent signs are considered from a rather new and deeper dimension. Religious texts, including the Qur'an, are no exceptions. A competent commentator, is the one who is able to

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... opriately use the intertextual sources in his Qur'anic interpretation. Intertextual interpretive approach, not only doesn't interfere with the Qur'an-to-Qur'an interpretation method, but is a complement to it.Qualification of the testaments as a source for intertextual interpretation of the Qur'an, is discussed in the second part of this article. Reviewing the background of this new approach , this article also shows that adopting this view, does not necessarily lead to the acceptance of Isra'iliyat and faked traditiond in Qur'anic interpretation nor does it proof the same validity or divine origin of the Quran for the Testaments . It does not even ignore other sources of knowledge for the interpretation of the Qur'an.