The history of agrometeorological crop yields forecast i s reviewed, an d the operational technical support system is described. Discussion is conducted on some problems encountered at present in operation: it is difficult to make n ationwide crop yields forecast; crop production forecast models should be mechan ism-based and dynamic, and crop production forecast should be oriented to the m a in crops in the world. The opportunity and challenges that the meteorological se rvice of China is confronted presently and the corresponding solutions are discu ssed.