PURPOSE: To safely and surely execute an outdoor dangerous work from the inside of a building by providing a truck main body moving on a guide rail of the building with a flexible bar, and controlling a movement of a cleaning box, having a monitor camera, a cleaning tool and a remote control part, attached to the tip of this bar by handy remote control.

CONSTITUTION: In a moving truck 2 moving along a guide rail 1, a flexible bar 3 is attached, and in a cleaning box 4 in the tip of the bar 3, a monitor camera 19 is installed. Its image is transmitted to an antenna 18a from an antenna 18b and a remote control operator 6, and reaches a controller 17. By its signal processing, the moving truck 2 and the bar 3 are operated through a cable 16, and by the controller 17, an operation of a remote control band 10 and a selecting and fitting operation of a work implement, etc., are executed. That is, a detergent nozzle 11, a cleaning brush 12, a suction nozzle 12a for dirty liquid droplets 20, and a finish wiper blade 13 are taken out in order, an exchange from the tip of a hand 10 is executed, and a windowpane 5 is cleaned.