An objective of the present invention is to provide a crop growth estimation device with which it is possible, for example, to estimate the growth situation of a crop at present or in the future even without being present at the site where the crop is being grown. This estimation device comprises a data acquisition means, a sub-model generating means, a storage means, and an estimation means. The data acquisition means acquires macro-region data and micro-region data, the macro-region data including satellite image data and/or meteorological data for a macro-region and the micro-region data including environment data, cultivated land data, and crop growth situation data for a micro-region. The sub-model generating means generates at least two sub-models from among (1) through (6) indicated below. The storage means stores the generated sub-models. The estimation means generates an estimation result for the growth of a crop in a given region from any of the data acquired by the data acquisition means on the basis of at least two sub-models from among the stored sub-models. (1) Generating, as a first sub-model, the growth situation of a crop from the macro-region data (2) Generating, as a second sub-model, the growth situation of a crop from the micro-region data (3) Generating, as a third sub-model, a future growth situation from the crop growth situation data (4) Generating, as a fourth sub-model, the micro-region data from the macro-region data (5) Generating, as a fifth sub-model, future macro-region data from the macro-region data (6) Generating, as a sixth sub-model, future micro-region data from the micro-region data
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