Coinciding with the extensive cultural developments in Iran during the Qajar era, the way Iranian society, and especially historians and chroniclers, looked at the subject of history and historiography changed. The change in historiography led to changes in both the theoretical aspect and the style of writing historical works. Several factors played a role in this change, without which knowledge of the generalities of historiography in the Qajar era would remain incomplete. This research intends to examine the factors effective in the process of change in historiography in the Qajar era with an analytical-critical approach and answer the question of what were the most important causes of the change in attitude towards the science of "history" during the Qajar era? And has this change been beneficial for the position of history in Iran? It seems that cultural factors, and at the forefront of them, the familiarity of Iranian society with Western culture and the spread of the intellectual movement, had the most important contribution. Of course, the impact of the politics and role of the Qajar rulers in the change in the way of looking at history during this period should not be overlooked. Another assumption is that developments in the field of historiography during that period simultaneously had positive and negative effects on the field of historiography in Iran.