Bridge load testing analysis system software BLT was specially used for bridge load testing in Highway or Civic Project, which was developed by Research Institute of Highway Ministry of Transport. It can establish a bridge three-dimensional finite element model, based on parameterized modeling technology, making a three-dimensional model browsing and post-processingcloud picture display platform based on OpenGL graphic technology. BLT system could make the static and dynamic test analysis based on solid element and space beam gird element, simplifying calculation parameters to realize the organic combination of calculate precision and efficiency. It could automatically recommend load testing scheme closely based on regulations and automatically calculate loading arrangement, as well as investigating the theoretical calculations of stress and displacement in the location of the measurement points and consulting the stress and displacement nephogram, and also finally output load test scheme and report.Comparing with solutions of the past software, this system is of high intelligence in Load Testing and improves the efficiency of bridge Load testing, which is a useful auxiliary tool for bridge detection engineers. This paper introduces the problems of past similar software, the characteristics of the system, as well as the real bridge application examples.