1. A method of decoding a multi-view image, the method comprising: receiving a bitstream comprising information indicating whether a picture in one view image sequence included in multi-view image sequences is a reference picture referred to by others in another view image included in the multi-view image sequences for inter-view prediction and data about the multi-view image sequences; extracting the information and the data about the multi-view image sequences from the received bitstream; and decoding the data about the multi-view image sequences based on the extracted information, wherein the information is included in a network abstraction layer (NAL) unit header, and wherein a picture which is a reference picture referred to by others in another view image sequence for inter-view prediction is included in a reference picture list and a picture which is not a reference picture referred to by others in another view image sequence for inter-view prediction is not included in the reference picture list.