A method for automatically designing cellular mobile radiotelephone networks whereby a design for a cellular mobile radiotelephone network or partial network for a new planning area can be produced automatically using available planning data for existing, planned, or abstract cellular mobile radiotelephone networks or partial networks and the space-related data of their planning areas and the space-related data of the new planning area, by processing the relationships between the space-related reference and planning data and applying coordinate and angle transformations to the site coordinates of the base stations and main beam directions of the antennae of the base stations of the reference data.