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In order to ensure flights safety and prevent runway incursion, Gaussian mixture model(GMM) based video background subtraction is used to track moving targets near runway safety area from video collected at the airport. The convex hull of the moving target’s pixel point set is calculated by Graham Scan algorithm and the state of motion of the moving targets is calculated by different between video frames. The distance between the moving targets and runway safety area is calculated by marking runway and runway safety area and Rotating Calipers algorithm. The runway incursion detection model and method are established to evaluate the safety status of the runway area. The simulation results show that this method can track moving targets near runway safety area and evaluate the alarm level of runway incursion efficiently and effectively.