A dairy animal treatment system (1) for fully automatically performing a teat-related operation on a dairy animal, comprising a treatment location (2) for receiving the dairy animal, a treatment device (7) which is configured for performing the teat-related operation on the dairy animal, a teat-detecting device (8) for determining a teat position of the teat of the dairy animal, a dairy animal position- determining device (3) for repeatedly determining an animal position of said dairy animal with respect to the milking stall and/or the dairy animal position-determining device, a robot arm (6) for moving the treatment device towards the teat, and a control device (5) which is configured to control the robot arm on the basis of the determined animal position and the determined teat position. The dairy animal position-determining device (3) comprises a mm-wavelength radar device which transmits a radar signal having a wavelength in the mm range. As a result thereof, the system can quickly and reliably determine the position of the dairy animal, as a basis for performing the teat-related operation, in particular for the swinging in of a robot arm, without being susceptible to dust, moisture or condensation. In this case, use is made of the fact that the position of, for example, a cow is fixed to a sufficient degree when determining the position of the rear end of the cow by means of a mm radar having a position resolution of a few centimetres.L'invention concerne un système de traitement d'animal laitier (1) servant à effectuer de manière entièrement automatique une opération associée au trayon sur un animal laitier, comprenant un emplacement de traitement (2) servant à recevoir l'animal laitier, un dispositif de traitement (7) qui est configuré pour effectuer l'opération associée au trayon sur l'animal laitier, un dispositif de détection de trayon (8) servant à déterminer une position de trayon du trayon de l'animal laitier, un dispositif de détermination de position
