The present disclosure relates to an information processing device and method for adaptively supplying data of partial images. The information processing device includes: a partial image information generation unit configured to generate partial image information which is information regarding each partial image which is a part of an entire image; and a metadata generation unit configured to generate metadata to be used for supply of a bit stream of the entire image and supply of a bit stream of the partial image using the partial image information generated by the partial image information generation unit. For example, the present disclosure can be applied to an information processing device that performs a process for adaptively supplying image data.