APART FROM RELIGIOUS AND ETHICAL AFFAIRS, AND PRAISING DEITIES, AVESTA INCLUDES VARIOUS SECTIONS SUCH AS ZOROASTER'S LIFE, HISTORY, GEOGRAPHY, AND EPICS, AND IT IS THE ONLY REMAINING DOCUMENT ABOUT PARTS OF IRANIANS' SOCIAL AND HISTORICAL LIVES, BEARING REFERENTIAL VALUE. GEOGRAGHICAL NAMES, AND NAMES OF IRANIAN AND TURANIAN TRIBES AND FAMILIES CAN BE SEEN IN AVESTA, EACH OF WHICH ABLE TO GUIDE US IN FURTHER GETTING ACQUAINTED WITH IRAN AND IRANIAN TRIBES' HISTORY IN THE FIRST AND SECOND MILLENNIUMS BC. SOME IRANOLOGISTS HAVE NOT TAKEN THE HISTORICAL VALUE OF AVESTA SERIOUSLY, AND CONSIDERED IT MORE A MYTHICAL AND POETIC TEXT. THEIR VIEWS ON THE AMOUNT OF THE USEFULNESS OF AVESTA IN IRANIAN STUDIES HAVE BEEN INFLUENTIAL AND INHIBITING. ON THE OTHER HAND, THERE HAVE BEEN NUMEROUS IRANOLOGISTS WHO HAVE CONSIDERED AVESTA AS A HISTORICAL, RELIABLE, AND REALISTIC TEXT, OR HAVE NOT IGNORED IT IN HISTORICAL DOCUMENTS TOTALLY. THE MAIN ISSUE IN THE PRESENT STUDY HAS BEEN THE VALIDATION OF AVESTA TEXTS SO THAT IT CAN BE UTILIZED AS A HISTORICAL DOCUMENT. THIS RESEARCH INTENDS TO CLARIFY THE ISSUE THAT HOW AND WHICH PARTS OF AVESTA CAN BE USED IN HISTORICAL RESEARCHES. HOW CAN HISTORICAL TRACES BE DERIVED AND USED IN REWRITING THE HISTORY OF IRAN, FROM A RELIGIOUS AND BENEDICTION TEXT, WHICH GETS POETIC AT TIMES, AND FROM AMONG THE LAYERS OF ITS LITERARY-LEGENDARY CONCEPTS? THE RELATED ISSUES HAVE BEEN CATEGORIZED IN THREE GROUPS OF GEO- HISTORICAL, HISTORICAL, AND ANTHROPOLOGICAL ISSUES, AND IN EACH GROUP, THE AMOUNT OF THEIR VALUE AND RELIABILITY IN IRANIAN STUDIES HAVE BEEN DISCUSSED. ULTIMATELY, IT CAN BE SAID THAT INFORMATION AVAILABLE IN AVESTA WILL PROVIDE SOLID AND HELPFUL FINDINGS FOR IRANIAN STUDIES. THIS APPROACH INDICATES THE NEED FOR A DEEPER INVESTIGATION OF AVESTA AND DISCOVERING MORE VALUES IN IT, MORE THAN EVER.