Food production in the world is dependent on agriculture as the plants are a food source. Agricultural activities are practiced since ancient times for food production as well as different plant products. So, it is necessary to take care of plants from different insects as well as a pest by sprayers. Thus, the focus of a study is to know the importance of robotic sprayers used in various farming activities. So the sprayers are used which helps the farmer control pest as well as spraying a fertilizers to enhance the productivity of the farm. There are different approaches made for developing robotic spraying drones using IOT as well as AI. Thus after analysis of different approaches, it is observed that the robotic spraying drones are efficient and reduce the time of farmers in the spraying activity. The study will help in knowing the importance of robotic sprayers in agricultural activities and develop new technologies from the present implementation in the sprayers.