The topic of this submitted diploma thesis is an analysis of the commissioning and evaluation of the public procurement in the Czech Republic. I pay attention to the most frequent mistakes at spending public funds through the public procurement. The first chapter is devoted to the theoretical description of the Czech public procurement system. The next chapters include the overview of the evaluation system and evaluation criteria in the public procurement. The forth and the fifth chapters are focused on the general and individual mistakes during the commissioning and the application procedure.