A method for operating a wind energy system comprising the steps of: setting at least one operational parameter of the wind energy system to a value, wherein the at least one operational parameter is one or more selected from the group consisting of pitch angle, torque-demand curve, rotation speed, tip-speed ratio, loads on components, azimuth position, and vibration level; measuring at least one yield parameter of the wind energy system, thereby obtaining yield parameter measurement results, wherein the at least one yield parameter is selected from the group consisting of the power curve (610,620,630), vibration level, loads on components, and component temperature; measuring at least one condition parameter, thereby obtaining condition parameter measurement results, wherein the at least one condition parameter is one or more selected from the group consisting of the wind speed, the turbulence intensity, wind direction, air pressure, temperature, and the number of days since last rain; retrieving historical data from a database; receiving data from other wind energy systems than the wind energy system; calculating at least one optimized value of the at least one operational parameter based on the outcome of the measuring at least one yield parameter, the outcome of the measuring at least one condition parameter, the historical data and the data from other wind energy systems; resetting the at least one operational parameter to the at least one optimized value of the at least one operational parameter; transmitting said at least one optimized value of the at least one operational parameter to one or more actuators with each actuator being connected with an adjustable part of the wind turbine system, wherein the one or more actuators and their respective adjustable parts are selected from drive and rotor blades; nacelle drive and nacelle; break activator and break; and magnetic field control and generator; repeated measuring of the yield parameter of the wind energy system, thereby obtaining repeated yield parameter measurement results; comparing the yield parameter measurement results with the repeated yield parameter measurement results; and storing data from the calculating in the database, comprising the values of the one or more operational parameters and the respective yield parameter measurements. setting at least one operational parameter of the wind energy system to a value, wherein the at least one operational parameter is one or more selected from the group consisting of pitch angle, torque-demand curve, rotation speed, tip-speed ratio, loads on components, azimuth position, and vibration level; measuring at least one yield parameter of the wind energy system, thereby obtaining yield parameter measurement results, wherein the at least one yield parameter is selected from the group consisting of the power curve (610,620,630), vibration level, loads on components, and component temperature; measuring at least one condition parameter, thereby obtaining condition parameter measurement results, wherein the at least one condition parameter is one or more selected from the group consisting of the wind speed, the turbulence intensity, wind direction, air pressure, temperature, and the number of days since last rain; retrieving historical data from a database; receiving data from other wind energy systems than the wind energy system; calculating at least one optimized value of the at least one operational parameter based on the outcome of the measuring at least one yield parameter, the outcome of the measuring at least one condition parameter, the historical data and the data from other wind energy systems; resetting the at least one operational parameter to the at least one optimized value of the at least one operational parameter; transmitting said at least one optimized value of the at least one operational parameter to one or more actuators with each actuator being connected with an adjustable part of the wind turbine system, wherein the one or more actuators and their respective adjustable parts are selected from drive and rotor blades; nacelle drive and nacelle; break activator and break; and magnetic field control and generator; repeated measuring of the yield parameter of the wind energy system, thereby obtaining repeated yield parameter measurement results; comparing the yield parameter measurement results with the repeated yield parameter measurement results; and storing data from the calculating in the database, comprising the values of the one or more operational parameters and the respective yield parameter measurements.