The Hittites established the first major political unity in Anatolia and became an important state in the era by strengthening it in economic and military terms. This state expanded its borders from Hattusa which is the center of its establishment, to Northern Syria. This political power, whose territory is expanding more and more, naturally became a geographically close country with other great powers of the era. This rapid growth of the Hittite State caused common conflict of interest with other states. And this situation required serious measures to ensure the safety of the country and the people living in the country. The security perception of the Hittite state can be examined under two main headings: "Internal Security" and "External Security". Internal security is the public order, whereas external security is the possible attacks that may come from outside the borders. The security measures of the Hittite State were not only due to political and military concerns. However, the philological and archaeological materials recovered clearly reflect the physical, social and economic dimensions of security. The king, who is the sovereign ruler of the Hittite State, gave orders to his highranking officials on internal and external security, and external security and made various arrangements in these matters. In this article, the security measures taken by the Hittites against the internal and external events will be discussed through the evaluation of the architectural ruins and documents what were left from them.