An apparatus, system and method for mapping information. The apparatus for mapping information includes an information input unit providing image information and position-view information in a specified area, a three-dimensional model database storing three-dimensional model data of a structure within the specified area and generating a two-dimensional image from the three-dimensional model data using the position-view information, an image processing unit comparing the two-dimensional image with the image information to analyze the image information, a related information acquiring unit acquiring structure related information within the specified area with reference to the analyzed image information, and an information mapping processing unit mapping the structure related information on the image information and outputting a mapping result.