CLASSIFICATION SYSTEM

[Problem] To determine which class an obtained image or observation data belongs to using a great amount of imagery, observation data, or the like (so-called "big data").[Solving Means] A classification system includes classification training data-specific classification data correct attribute setting means configured to set not only the correct classes of pieces of classification training data but also the correct attributes of the pieces of classification training data and classification/ attribute training means configured to train classification means by comparing the class/attribute estimation result outputs with the correct classes set by correct class setting means and comparing the attribute estimation result outputs with the correct attributes set by the classification training data-specific classification training data correct attribute setting means. Pieces of classification target data from classification target data acquisition means are newly inputted to the trained classification means. Classification/attribute result output means outputs both the classification results and attribute results of the pieces of classification target data so that validity of the classification results can be considered.