Bachelor thesis is focused on testing of non-prism lenghts measurement device Trimble S8 DR Plus ROBOTIC. The objective of the testing was to verify the accuracy of the non-prism measurement on base and assess the impact of incidence angle of the laser beam for accuracy of lengths measurement. The work consists of five chapters, including the conclusion. In the first chapter are the methods of lengths measurement. In the second chapter is a brief description and technical parameters of universal measuring station Trimble S8 DR Plus ROBOTIC. The third chapter deals with the design and realization of testing non-prism lengths measurement. The fourth chapter presents the processing and interpretation of results.