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Software is developed with the tool of Visual Basic 6.0, aiming at the statistic and application problems about the groundbased observation data relevant to the operational agrometeorological service. The system can extract data from surface observation data and save them into a database. From the database, some useful data can obtained such as the accumulated temperature, the normal means for a certain week in history, the precipitation data in the table of soil moisture observation, and the relative data from natural phenological observation, as well as the data needed in crop meteorological condition appraisal and climate assessment.