Disclosed are a video coding/decoding method and apparatus, and a method for generating and storing bit streams. The video decoding method comprises determining whether residual block information of an object block is present based on predetermined information representing whether the residual block information is encoded; and generating the object block based on an intra prediction value and theresidual block information when the residual block information is present. Consequently, encoding and decoding efficiency can be increased by carrying out the encoding and decoding of screen residualdata only for object blocks where there is a need for a residual data block in accordance with screen similarity.