In this paper, the authors explain about the outline concept of smart city and various areas to which services can be provided for making a city smart. Various approaches are also identified to maintain the public safety in smart cities. This paper has critically reviewed the necessity of the public safety from any disaster or suspicious and how it can be resolved by using video surveillance. Video surveillance among other aspects is explored which leads to a smart city with high quality of life by providing safety to citizen. Existing video surveillance methodology was recognized and addressed for quickly analyzing the circumstances or object captured in the form of video even when the visibility is not so clear.