Abstract: A method of setting spatial information for defining a space in the shape of dimensional data or property information including relationship information between objects installed in the space is defined, and a video monitoring apparatus is set to be linked to the defined method. Then, based on the same, a video captured by a video monitoring apparatus provided in a space may be efficiently output on the web. Therefore, various functions may be performed in which 3-dimensional spatial information and video monitoring are linked in a very easy way.