Voltage fluctuations in electrical power systems pose significant challenges to the performance, efficiency, and lifespan of sensitive equipment in industrial, commercial, and domestic applications. These variations, caused by load changes and supply instability, can lead to overheating, reduced efficiency, and equipment failure. This paper presents the design and implementation of a high-precision servo-controlled voltage stabilizer (SCVS) based on a closed-loop feedback control mechanism. The proposed system integrates an auto-transformer, buck-boost transformer, sensing unit, and an AC servo motor to dynamically regulate output voltage. The stabilizer continuously monitors the output voltage and compensates for input variations by either boosting or bucking the voltage, ensuring stable output conditions. Experimental analysis demonstrates that the systemmaintainsoutputvoltage within ±1% accuracy over a wide input range of 180 V to 260 V, with a fast response time of less than 100 ms.Theresultsindicate improved voltage regulation, enhanced system stability, and increased protection of connected equipment compared to conventional stabilizers [1], [3]. The proposed SCVS is therefore a reliable and efficient solution for applications requiring precise voltage control and high power quality. Keywords: Servo-Controlled Voltage Stabilizer (SCVS), Voltage Regulation, Power Quality, Buck-Boost Transformer, Auto-Transformer, Closed-Loop Control System, Servo Motor Control, Voltage Compensation, Industrial Power Systems, Protection