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This system was designed for anesthetic agent, sevofluorane, which is among the first choices of anesthesiologist for inhalation anesthesia. Sevofluorane is a halogenated volatile anaesthetic with a low blood gas solubility. This facilitates smooth and rapid induction of anesthesia, allows easier titration of anesthetic dose to the desired effect during the maintenance period, and permits rapid emergency and recovery at the end of the anesthesia. In this study, sevofluorane depth of anesthesia was examined through a microcontroller-based fuzzy logic control system according to the blood pressure and heart rate taken from the patient. The potential benefits of the systems are as follows: 1) To increase patient safety and comfort; 2) To direct the anesthesiologist's attention to other physiological variables which they have to keep under control by abating their tasks; 3) To make optimum the area of the anesthetic agent; 4) To help protect the environment by using the optimum anesthetic agent; 5) To economize by lessening the costs of an operation. This study will serve as a guide in developing new anesthesia control systems for patients who are in different agent and different risk groups. All the details concerning the system design are given in paper.