To reduce the frequency of misoperation in railway container unloading, a railway container train anti-misoperation system is designed and implemented. The system which uses a variety of techniques, such as high-precision angle sensor, wireless communications, real-time 3D animation, can provide 3D display of container posture and accurate judgement of separation status of container and train. The system can also provide a dangerous alarm function for the operators, to ensure the safety of container operations.In the test, the system works properly, achieving the target of designing.