In any situation, a person should be able to protect his life and property against natural and unnatural threats. The purpose of the research suggests that it is possible for the country to be involved in unwanted hard, semi-hard or soft wars as in the past, and we must prepare for each of them and defend the Islamic homeland, because in the 20th century, more than 220 wars It has continued to happen and more than 200 million people have lost their lives, and this is a warning for preparation.
The research method of this research is descriptive, analytical and with practical purpose, and since the subject is rooted in the past, the historical method has also been used. The hypothesis of the research suggests that our Islamic homeland has witnessed several important wars in the past years, and confronting the Islamic revolution is also part of the strategic goals of global arrogance, and Iran is capable, just like the eight years of holy defense, by providing necessary training to members of the society in the field of passive defense. and create the desired security, defend the nation and the country. The findings of the research show that passive defense is the key to creating security in the Islamic homeland by observing the relevant principles and techniques and providing the necessary awareness to the members of the society. The result is that Imam Khomeini (RA) says: "In any situation, the country's defense base must be in the best condition...", therefore, considering this emphasis and the necessity of providing security and necessary preparation, the principles of passive defense should be in urban architecture and In terms of the strength of the buildings and safety for the members of the society, the village should be reviewed and the principles of engineering should be considered in them.