Selective Laser Thermoregulation (SLT) is a promising technique for accelerated thermal testing of high-temperature structural materials, as it enables localized and rapid heating using a high-power laser and a galvanometer scanner. However, achieving a spatially uniform temperature distribution remains challenging, particularly for elongated specimens with non-uniform heat dissipation characteristics, where excessive heat accumulation at the center and strong cooling at the edges frequently occur. This study proposes and experimentally validates a feedback-based scan-path control strategy for improving temperature uniformity in SLT systems. The developed system dynamically determines laser irradiation positions based on real-time temperature distribution measurements obtained from radiation thermometers. The scan area is divided into multiple regions, and the coldest point in each region is sequentially irradiated within each feedback cycle. The effects of region division schemes and scan orders on spatial temperature uniformity and temporal stability are systematically investigated. Experimental results reveal that insufficient region division leads to intermittent heating and large temperature fluctuations, while overly fine division causes excessive heat accumulation in low-dissipation regions. A 2x2 region division combined with a clockwise scan order is shown to effectively prioritize heat input to high-dissipation peripheral regions while avoiding unnecessary heating of the specimen center. This approach significantly reduces temperature gradients and spatial standard deviation compared with conventional scan paths. Furthermore, comparisons between feedback and feedforward control demonstrate that the proposed feedback system autonomously derives scan paths consistent with the specimen’s heat dissipation characteristics, enabling robust and uniform temperature control even for targets with unknown thermal behavior.