Abstract: A method and a device for controlling a silo unloader of the type comprising a first electrical motor for driving a gathering apparatus located on the top of the bulk material and a second electrical motor operating a winch to which is suspended the gathering apparatus for lifting, holding in position at the same level or lowering this gathering apparatus into the silo. The method comprises the steps of measuring the current supplied to the first motor and controlling the second motor for lifting, holding in position at the same level or lowering the gathering apparatus in accordance with the measured value of the current. The control device comprises a current detector and an accurate rectifying amplifier for generating a measure signal in relation with the current supplied to the first motor.