This standard specifies the principles of agrometeorological observation of winter wheat, the observation content of winter wheat development period, growth status, growth amount, yield structure and quality, wheat field environmental factors, major agrometeorological dis sters, major dis ases and insect pests, etc., as well as the observation times and morphological characteris ics. Indicators, observation methods and recording formats for observation results, etc. This standard applies to agrometeorological observations of winter wheat.