The relationship between moral philosophy and philosophy of law has always been one of the most challenging contemporary philosophical debates. One of the most controversial questions has always been the field of ethics and law in determining and narrowing the limits and scope of criminology, what considerations and moral requirements should be considered and given priority. In other words, philosophers of ethics and law have long sought to discover / construct a morally relevant criterion and basis for defining the boundaries and limitations of legislation and criminology, and to develop and narrow the scope of the legislature's influence and authority in prosecution and criminality. infact, they have designed and codified principles that, in addition to determining and explaining the basis and limitations of the field of punishment and criminology, explain and facilitate the procedures and procedures of legislation and determination and detection of criminal acts and procedures, and from another point of view, Provide justification for legal interference with privacy and individual freedoms. In this research, the most important principles and ethically relevant reasons in determining and delimiting the realm of criminology - with special emphasis on liberal principles and ideas - have been studied. It is worth mentioning that some philosophers in the field of moral philosophy and philosophy of law, while acknowledging the ineffectiveness of the old and classical basic and principles of criminology, have tried to reinterpret the previous principles and in this regard have presented new and revised interpretations. They are specific to paternalism, they also indicate a tendency towards moral legalism and the avoidance of classical utilitarian and liberal presuppositions. The relationship between moral philosophy and philosophy of law has always been one of the most challenging contemporary philosophical debates. One of the most controversial questions has always been the field of ethics and law in determining and narrowing the limits and scope of criminology, what considerations and moral requirements should be considered and given priority. In other words, philosophers of ethics and law have long sought to discover / construct a morally relevant criterion and basis for defining the boundaries and limitations of legislation and criminology, and to develop and narrow the scope of the legislature's influence and authority in prosecution and criminality. infact, they have designed and codified principles that, in addition to determining and explaining the basis and limitations of the field of punishment and criminology, explain and facilitate the procedures and procedures of legislation and determination and detection of criminal acts and procedures, and from another point of view, Provide justification for legal interference with privacy and individual freedoms. In this research, the most important principles and ethically relevant reasons in determining and delimiting the realm of criminology - with special emphasis on liberal principles and ideas - have been studied. It is worth mentioning that some philosophers in the field of moral philosophy and philosophy of law, while acknowledging the ineffectiveness of the old and classical basic and principles of criminology, have tried to reinterpret the previous principles and .