The topic of this bachelor thesis is design and development of a battery powered robot lawn mower. In the introduction the history of lawn mowers is described as well as different types of lawn mowers. Similar devices currently on the market are listed and compared. The functional decomposition and morphological matrix of the device where created. The best solutions where further elaborated and standard parts where selected. The 3D CAD model of the device and the associated technical documentation were created in the SolidWorks 2016 software package.