Abstract: A burner replacing system has a rail mounted in a ring around the outer periphery of burners mounted radially at the middle of a gas turbine. A carriage turns around the burners via the rail; and supports a pull-out slide via a rotary shaft which turns the slide up and down in the direction of a center axis of the gas turbine. Another rotary shaft turns the slide right and left around a radial axis of the gas turbine. The slide moves in the axial direction of the burners. A hand for gripping the burner is supported by the pull-out slide via a centering slide which moves up and down in the radial direction of the burner. An alternate system has a pull-out slide which is supported by the carriage and moves forward and backward in the axial direction of the burner. A telescopic slide is supported by the pull-out slide and expands in the axial direction of the burner. The hand is provided at the edge of the telescopic slide to grip the burner.