The project will be a 4-wheel drive robot that will be fully controlled by wi-fi. this will be achieved by developing a web server with the help of wi-fi adapter using linux based raspbian os on raspberry pi platform. the commands to operate the bot will be given through the web-server page. the bot will also contain a web-cam which will be interfaced with raspberry pi b+ controller. this web-cam will capture the video which will be sent to the operating station through wi-fi adapter as the source. this video streaming can be monitored through the web page on a pc, laptop or tablet. thus the bot will serve the purpose of live surveillance. also using the same web page, the robot can be given a command to perform any action like tear gas release or chloroform release etc. (or any other action). this will be performed by taking the output from the gpio pins of the raspberry pi board.