Hotel management is an activity that deals with the provision of accommodation services and additional services to guests. It requires a high level of standardization to ensure consistency, quality and safety in service provision and guest satisfaction. The purpose of this work is to point out the importance of implementing quality management systems, environmental protection, food safety and information security management and occupational safety in the hotel industry. Accordingly, this work aims to show the importance of standardization for business with a special emphasis on the analysis of the current situation regarding the application of management system standards. This work analyzes the application of individual ISO standards, using available data from the ISO Survey, with the aim of emphasizing the importance of standardization for business, especially in the context of their representation in the world and in Croatia. The paper analyzes the standards ISO 9001:2015, ISO 14001:2015, ISO 22000:2018, ISO 27001:2022, ISO 45001:2018 and ISO 50001:2018, with a focus on their characteristics and application. Special emphasis is placed on the hotel and restaurant sector, in order to provide insight into the application of the above standards in the hotel industry.