Abstract: A robot system, including: a robot; a base supporting the robot; a controller connected to the robot; a processor connected to the controller; a depth camera connected to the processor; a flange plate; a coupling shaft including a first end and a second end; a mounting base including an elongated hole, a first side wall, and a second side wall; a sprayer including a mounting shaft; a first positioning bolt; a limit arm includes a first end and a second end; an axis pin; a limit shaft; a second positioning bolt; a gas cylinder; a piston rod; a connector; a shifter level; a trigger. The robot is connected to the first end of the coupling shaft via the flange plate. The second end of the coupling shaft is connected to the mounting base. The mounting shaft of the sprayer is disposed in the elongated hole of the mounting base.