The Republic of Moldova as an independent state is a full element of the international security system, adapting its national security system to the requirements of the international one. Our state actively participates in international security organizations, both as a member and in various international peacekeeping operations. Analysis of the evolution of the security and defense policy development process, depending on the modification of the internal political component; the reaction to the challenges exposed from outside, such as terrorism, geostrategic interests from the outside; as well as the process of establishing the internal legislative framework in the field, has led the author to design the stages of the development of the security and defense policy that is mobile and requires a continuous review and adaptation to the circumstances of a constantly evolving environment.