Daily greenhouse environment decision support server according to an embodiment of the present invention, a meteorological data receiving unit for receiving current weather data from the Korea Meteorological Administration; Past data receiving unit for receiving past data including past meteorological data and past greenhouse data of the last crop leading farms corresponding to the items of crops from the database; a similar graph selector for selecting a similar graph having a pattern similar to that of the current weather data by comparing the patterns of the current weather data and the past weather data; and a daily environment prediction value calculation unit calculating a difference value between the past weather data and the past greenhouse data of the similar graph, and calculating a daily environment prediction value by applying the difference value to the current weather data.
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