A robot system, comprising: a robot; a liquid application part provided on the robot; an application thickness measurement part measuring an application thickness of a liquid applied by the liquid application part; and a distance measurement part measuring a first distance from the distance measurement part to an application object; and a control part controlling the robot based on the first distance so that a second distance from the liquid application part to the application object becomes constant;, wherein the distance measurement part, the liquid application part and the application thickness measurement part are arranged in this order in an application direction of the liquid; the robot system being characterized in further comprising: a supply amount adjustment part adjusting a supply amount of the liquid to the application object according to the application thickness measured by the application thickness measurement part; and in that the liquid application part comprises a syringe and a nozzle, wherein a discharge of the liquid is suppressed by creating negative pressure inside the syringe, and the discharge of the liquid is performed by creating atmospheric pressure or positive pressure inside the syringe, and the supply amount adjustment part adjusts the supply amount of the liquid to the application object by adjusting a distance between the nozzle and the application object. a robot; a liquid application part provided on the robot; an application thickness measurement part measuring an application thickness of a liquid applied by the liquid application part; and a distance measurement part measuring a first distance from the distance measurement part to an application object; and a control part controlling the robot based on the first distance so that a second distance from the liquid application part to the application object becomes constant;, wherein the distance measurement part, the liquid application part and the application thickness measurement part are arranged in this order in an application direction of the liquid; the robot system being characterized in further comprising: a supply amount adjustment part adjusting a supply amount of the liquid to the application object according to the application thickness measured by the application thickness measurement part; and in that the liquid application part comprises a syringe and a nozzle, wherein a discharge of the liquid is suppressed by creating negative pressure inside the syringe, and the discharge of the liquid is performed by creating atmospheric pressure or positive pressure inside the syringe, and the supply amount adjustment part adjusts the supply amount of the liquid to the application object by adjusting a distance between the nozzle and the application object. a supply amount adjustment part adjusting a supply amount of the liquid to the application object according to the application thickness measured by the application thickness measurement part; and in that the liquid application part comprises a syringe and a nozzle, wherein a discharge of the liquid is suppressed by creating negative pressure inside the syringe, and the discharge of the liquid is performed by creating atmospheric pressure or positive pressure inside the syringe, and the supply amount adjustment part adjusts the supply amount of the liquid to the application object by adjusting a distance between the nozzle and the application object.