To estimate a quality index of an object product based only on appearance of the object product.SOLUTION: A quality learning device of the present invention includes: an image processing unit that is communicatively connected to a camera for acquiring an image of a sample of an object and acquires a predetermined pixel value of the sample of the object from the image; and a learning data creation unit that estimates an index indicating quality of the sample of the object at a time point when the image is acquired and creates a set of time-series combinations of the acquired pixel value and the estimated index. The quality learning device further includes: an input processing unit that is communicatively connected to a container for storing the sample of the object and receives a control value on air conditioning inside the container; and an air conditioning control unit that performs, based on...

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