Milk quality is the rate which takes in a normal composition and a tipical characteristic. The standards and other documents like veterinary - sanitary instruction are making to secure and to control a quality of milk. In the period from 1938 to 2007 the standards of milk quality was changed very often and requirement of an animal welfare, of milk process and a primary milk processing, of staff hygiene and milk quality was tightened up. There was changed a primary milk quality valuation – for procurement milk temperature, acidity, milk cleanness and density. Most of all in the period from 1993 to 2007 was changed the norms and evaluation of milk bacterial pollution and somatic cell count. In 1970 in veterinary - sanitary instructions milk was sorted out, but in 2004 05 01 when Lithuania joined in to EU, sorts of milk was canceled. In period from 1938 to 2007 when was improved on technology most of all milk composition and milk quality evaluations was changed and became more scientific, more faster and cheaper.