The 60year development course of NWP operational system has been reviewed since the establishment of the Central Meteorological Office. It is pointed out that NWP is a sysytem construction of meteorological engineer and the result of multidisciplinary integration and theorytechnology combination. The decisionmaking scientifically and the practical processes are reviewed from the aspects of targets,technical line,working pattern, personnel training and engineering construction etc. It is illustrated that the decisionmaking scientifically is the fundamental guarantee for the sustainable development of meteorological operation system construction. It can be seen from the above engineering construction that the history in the 30year successful development of NWP has demonstrated the correctness of the scientific outlook on development.