The dissertation deals with potential energetic saving in cow milk cooling. The theoretical part contains an information about cow milk and refrigeration systems for milk cooling. Measuring in laboratory conditions was performed with the aim to collect a sufficient quantity of measured data for the qualified application of flat-plate coolers in measuring under real operating conditions. The practical part measuring in real operating conditions was implement in a farm. The practical part examines milk cooling using milk flow-through plate coolers and from the values obtained it formulates conclusions and recommendations for practice.