A method of extracting at least a portion of moving image data from supplied moving image data is provided. The method includes (a) a moving image evaluation step of generating moving image evaluation data by evaluating the supplied moving image data, the evaluation being chronologically performed based on a prescribed condition, (b) a moving image data extraction step of extracting the at least a portion of moving image data from the supplied moving image data based on the moving image evaluation data, and (c) a moving image data classification step of classifying the extracted moving image data into a plurality of classes based on the moving image evaluation data.