Abstract: Agrometeorological operational system in China includes elementary operation and operation system. Its development can be divided into two stages during the last forty years. The first stage from the mid 1950s to the early 1960s is a primary stage in which the elementary operation was initiated nation-wide. Since 1980s, the second one is a developmental stage, the elementary operation and the operational system have been developed. A perfect operational system was established during this period. State-level agrometeorological operation plays a very important role in the national agrometeorological operational system.