The importance of the Driver Monitoring System (DMS) lies in its ability to effectively prevent traffic accidents caused by fatigue or distracted driving. By monitoring the driver's facial features, eye movements, and head posture in real-time and combining this data with artificial intelligence algorithms, the system assesses the driver's attention state. With technological advancements, DMS has evolved from basic fatigue monitoring to multi-task analysis, including emotion recognition, and integrates with vehicle safety systems like lane-keeping assist to further enhance intervention effectiveness. Regulatory-wise, the EU has mandated DMS installation in new vehicles, while similar standards are being progressively adopted in local commercial vehicle markets, underscoring the technology's pivotal role in road safety. Long-term, widespread DMS adoption will substantially reduce accident rates attributable to human error, proving particularly valuable for long-haul and nighttime driving scenarios.