During painting process, chemicals in the paint can cause hazards to the human painters such as eye and respiratory system problems. Paint rollers and Paint brushes were used to paint the wall from top to bottom. By repeating the process like pulling the roller and lifting the ladder may cause back ache. These reasons makes us to develop automatic wall painting robot. The robot consist of an arm which scan the wall vertically .IR sensors are fitted on the arm. It calculate the distance between wall and the spray gun. The microcontroller unit is designed to control the movement of the DC motor. The cost of the robot is low and reduces the work of the human.

Keywords : Spray Gun, Microcontroller, IR Sensor.