ABSTRACT The meaning of family harmony is that the marital relationship of man and woman is stable. As such, every member of it, be it an agricultural or an industrial society, is bound by its decisions. And the basis of social stability is family harmony. In a society in which there is no restriction on the relationship between men and women, children are not an integral part of the family and elders are not respected, the society is prone to sexual immorality and criminal negligence, devoid of compassion and mercy and devoid of human compassion. goes Family disorder is also the cause of the current social chaos, irresponsibility in sexual relations, frequent divorces, restraint of reproduction and lack of respect for the elderly are the evils that have destroyed stability and peace. In this article, the thesis writer will close his pen "in the light of the principles of Islamic teachings on maintaining the structure of the family system in the 21st century.