In recent years, overload and overdraft phenomenon is more and more serious in inland waterway, and many traffic accidents have occurred from time to time, such as stranding, collision, etc. The corresponding management approach is simple, although the relevant departments have invested huge human, material and financial resources, but the effect is not satisfactory. Based on laser scanning and video analysis, an automatic overload and draft monitoring system is designed, and it is applied in the water areas of Zhenjiang local maritime bureau. The result shows that the system performs excellently in accuracy and real-time etc. in application. And this system can meet the needs of the daily supervision of maritime department.