Abstract: A method of adjusting a snoring mouthpiece includes the steps of: reading a first medical image, establishing a first respiratory tract model, performing a first respiration simulation, reading a second medical image, establishing a second respiratory tract model, performing a second respiration simulation, calculating an adjustment distance, and adjusting the snoring mouthpiece. The method is so designed that tomographic images of a patient's respiratory tract are read at two separate times in order to establish models, perform respiration simulations, and thereby provide the correct distance by which to adjust the snoring mouthpiece. This allows the snoring mouthpiece to be adjusted rapidly and correctly and work effectively.