Robot and method for cleaning external glass in room based on femtosecond laser

The invention discloses a robot and method for cleaning external glass in a room based on femtosecond laser. The robot comprises a femtosecond fiber laser, a real-time monitoring system and a control center, wherein both the femtosecond fiber laser and the real-time monitoring center are connected with the control center; the femtosecond fiber laser is used for removing dust and stains from the surface of the glass; the real-time monitoring system comprises a positioning instrument, a glass thickness detection instrument, a glass layer detection instrument and a glass light transmittance detection instrument; the positioning instrument is used for positioning dust and stains on the glass. Dust on the outer surface of a glass curtain wall or a glass window can be removed under the situation that the robot is arranged in the room, so that danger of outdoor cleaning is avoided, rapidness and high efficiency are realized, and the problems of high danger and high operation difficulty of the conventional outdoor cleaning robot, short service life caused by long-time outdoor exposure, and the like are solved.