Precision tests of the electroweak theory

In this review we give a discussion of the structure of the standard model and its quantum corrections for testing the electroweak theory at present and future colliders. After a short summary of the tree level structure of the standard model we outline the calculation of physical quantities at the quantum level. Concrete applications are given to the vector boson mass interdependence and the Z resonance. Finally we show a comparision of the standard model prediction for the electroweak precision observables with the most recent experimental data.