A parallel audio transcoding method includes splitting audio into segments of a certain length; performing parallel transcoding by allocating the split segments to a plurality of encoders; and concatenating the segments encoded through the parallel transcoding and merging the same into a single encoded file. Performing parallel transcoding includes inserting additional regions, which overlap and neighbor each of the split segments, and sending the same to the encoders, and merging includes cutting out the additional regions from the encoded stream to create a stream corresponding to the split segments.