The aspiration to achieve comparative advantages in the tourism of the Republic of Serbia has increased the competitiveness of this branch.. Various measures in order to achieve the expected results are being undertaken. One of the measures is the decision of the Belgrade Chamber of Commerce on the development of criteria for evaluating the quality of services. Application of multi-criteria decision-making (Analytic hierarchy process (AHP) and Technique for Order Preference by Similarity to Ideal Solution method (TOPSIS)) method and their computer support in making decisions for the given problem greatly simplifies and speeds up the process. The application program, created for the purpose of solving this problem simply provides solutions after entering the data. The aim of this work is to, by solving this problem, point to the necessity, assistance and importance of the scientific discipline of decision-making theory and decision-making support systems in everyday decision-making that are applied by individuals or groups, solving this problem.