The present disclosure relates an image processing device and method enabling merging blocks in the temporal direction in motion compensation. Provided is an image processing device including a determining unit configured to determine whether or not motion information of a current block which is to be processed, and motion information of a co-located block situated in the temporal periphery of the current block, match, and a merge information generating unit configured to, in the event that determination is made by the determining unit that these match, generate temporal merge information specifying the co-located block as a block with which the current block is to be temporally merged.