The article deals with mystery shopping as a tool leading to an increase in the quality of tourism business services. The aim of the paper is to describe the methodology of data collection through mystery shopping and to apply the estabilished facts in the management and operation of a tourism company. The article is based on own research. The main purpose of the research was to analyze the development of the quality of the service provided in the selected tourism company and thus create the preconditions for the improvement of service management and thus the quality of the company. The Mystery shopping method was used for the analysis of the quality of services in several phases in the years 2014 to 2019. The results of the research were applied directly in the hotel's operations, while within one year improvements in its individual operations were recorded