Since 2016, Chinese meteorologists have promoted the construction of meteorological modernization vigorously centering on seamless, accurate and intelligent weather forecast. In 2017, Ningxia meteorologists promoted the construction of an intelligent grid forecast system actively and they had made some achievements for grid forecast technologies, for example, intelligent correction, subjective and objective fusion correction, grid/station/zone integration, and disaster weather intelligent recognition. Those technologies were truly applied to forecast platform. One of the key technologies was space-time coordination and consistency, which played a very important role in the intelligent grid forecasting. This paper mainly introduced the design ideas and implementation process of this key technology.