1. A video surveillance system, comprising: a video receiver configured to receive and store a video captured by at least one IP camera; a video request receiver configured to receive, from a user terminal, a video request of an object of interest that corresponds to an object ID code; a camera searcher configured to search for an IP camera that is capturing a video that includes the object of interest; a video processor configured to process uninteresting objects, excluding the object of interest, in the video captured by the searched IP camera so as to make the uninteresting objects indistinguishable; and a video provider configured to provide the video, which has undergone processing by the video processor, to the user terminal that has requested the video.