The study aims to refer to the fundamentalist rules; As one of the sciences of the machine that preserves the sciences of religion. Just as the Noble Qur’an is reached with the science of interpretation, the Prophet’s Sunnah with the term hadith, and the Arabic language with its grammar and its attachments, so it is reached to derive the legal costs with the principles of fundamentalism. It also aims to refute the suspicions of the West about the primacy of their claims, international charters, and global conferences to guarantee human rights, and to show that Islamic Sharia in this matter is more appropriate, and it is prior to others; By making human rights an integral part of the necessities of his existence, so where is the chandelier? Human rights are a matter adopted by Islam, in which scholars and researchers have been classified trying to demonstrate God’s honor for him. And an indication of the purification of the principles of jurisprudence from what is thought - slanderously - confined to the scope of specialization, so that only specialized researchers can benefit from it, and those who are still studying it in its purely heritage form without the realities of life. With this in mind, the study comes to show that the principles of jurisprudence are a guiding law, not a restriction that hinders. As for the faster separation: in the origins that are attached to the opposition, the hypothesis, the transcription, and the rituals, then the time. As for the recommendations of the study: they come first in the need to complete the project of the impact of fundamentalist rules in various aspects of Islamic jurisprudence, and also recommends the necessity of linking fundamentalist rules with legitimate purposes, because they are two sources of understanding. Sharia, and with them the original purpose of their situation is achieved, which is to bring benefits and advantages.