Research was carried out in four cowsheds, where various milking systems were operated - a bucket milking machine, a pipe milking machine, a herringbone milking parlour 2x4 and 2x9 stands. For morning and evening milking which was carried out timing of devices and staff operation time was carried out. Three indexes were used for the system comparison. Operational efficiency W07 – number of milked cows in time T07 from the moment a milkman enters to the moment of milking machine is cleaned. Effective productivity W1 – number of milked cows from the moment of preparing the first cow's udder, a bucket milking machine, a pipe milking machine or from the moment the first cow enters the milking stand in the parlour to the moment of taking off the last apparatus or respectively from the moment the last cow leaves the stands to time T1. Milker's efficiency Wdoj – number of milked cows from the moment a milker leaves the cowshed per 1 person. Operational efficiency in comparison to effective productivity depending on the milking system may differ by almost 50% for a bucket milking machine and by 30% for the milking parlour.