具有实时检测、跟踪和分析判断的智能化监控系统是智能化监控系统发展的必然趋势，本文提出一种在实时监控下检测和跟踪运动目标的方法，首先使用背景差分法检测出运动目标，并定期使用背景更新策略对参考背景进行局部更新，这样可以提高目标检测的精确度。目标跟踪时在不同的尺度空间获得目标的关键点，增强算法目标在遮挡情况下的鲁棒性， 接下来使用mean shift 算法估计目标在下一帧的位置。-Intelligent monitoring system with real-time detection, tracking and analysis to determine is the inevitable trend of development of the intelligent monitoring system, this paper presents a real-time monitoring, detection and tracking of a moving target, and the first to use background subtraction method to detect moving targets, and The regular use of background updating strategy partial update of the reference background, so you can improve the accuracy of target detection. Target tracking target key points in different scale space, enhance the robustness of the algorithm target under occlusion, followed by use of the mean shift algorithm to estimate the target position in the next fr a me.