A method and system for controlling an injection valve has the following steps: recording a voltage curve of a voltage present at a piezoelectric actuator of the injection valve and a time characteristic curve of an electric charge which is shifted in a circuit with the piezoelectric actuator during a reference injection, computationally determining a force curve of a force applied by the piezoelectric actuator to a moving closing element of the injection valve during the reference injection from the voltage curve and the time characteristic curve of the electric charge, determining a location of a maximum of the force curve,—specifying an activation time instant and/or an activation duration and/or an activation pulse intensity for at least one subsequent injection as a function of a time offset between an activation time instant selected for the reference injection and the maximum of the force curve.