According to one embodiment, an information processing device reads a management file in a storage device. The information processing device analyzes information necessary for management and stores the analysis result. The information processing device performs specified processing based on the analysis result stored by the analysis processor. The information processing device obtains update information of the management file of each content item accumulated in the storage device and determines whether the update information has been changed or not. The information processing device performs the specified processing using the analysis result previously stored by the analysis processor if the update information has not been changed.