a method for installing a rotor blade on a wind turbine , the rotor blade comprising a blade root for fastening the rotor blade to a hub , a blade tip facing away from the blade root , and a longitudinal axis running from the blade root to the blade tip , and the method comprising the steps of : hoisting the rotor blade using a crane , recording measurement data relating to the position and / or orientation of the rotor blade using at least one measuring means during the hoisting , and transmitting the measurement data to at least one monitoring station for monitoring the hoisting and / or to at least one control facility for controlling the position and / or orientation of the rotor blade .