The invention provides a labeling device which comprises an obtaining unit for obtaining preset labeling information when an instruction for labeling one or more graphs on a drawing is received, an information determination unit for analyzing the attributes of the drawing and the labeling information and determining precision information corresponding to one or more graphs according to an analysis result, and a labeling unit for labeling precision data corresponding to each graph in an appointed position on the drawing according to the precision information corresponding to the graph, wherein the labeling information comprises user names and the precision information of various graphs corresponding to the user names. Correspondingly, the invention further provides a labeling method. Through the technical scheme, the graphs can be quickly and accurately subjected to size precision labeling, thereby improving the data labeling efficiency and accuracy.