Various opinions have been put forward about Achaemenian beliefs and thoughts, especially about the religious beliefs of the Achaemenian kings such as Cyrus the Great. Scholars rely on Herodotus’s statements that “they didn’t look at building temples and altars as a religious tradition, they refer believing in these things as ignorance and foolishness in the converse opinion to Greeks. They didn’t believe that Gods had the same nature of human. In their religion, Zeus (Ahura-Mazda) was the sign of the blue dome of the sky and was a wise master. Their traditions were going to the highest peaks of mountains praying and offering sacrifice to God. Sun, moon, fire, water, wind and other divine existences are only bodiless Gods that Iranians pray and offer them sacrifices.” According to Herodotus Iranians in the Achaemenian era, had no idol, temple and altar. In this article we have used the most accessible sources and references to study Achaemenian religion and their temples. Various opinions from the researchers have been cited here. The historic art of the Achaemenians, the inscriptions, and fire alters quadrangles and fire temples (or Brasmadana) the Achaemenian shrines which were generally located in holy areas are being focused in this article.