This master's thesis explores the application of thermal cameras in the modern world. The study aims to provide a comprehensive overview of thermal cameras, their characteristics, types, and applications. The basic principles of thermal camera operation, their technical specifications, and the possibilities of capturing thermal patterns are analyzed. Reviewing the available thermal camera types, their specific features and applications in various fields are explored. Particular emphasis is placed on using thermal thermal cameras in the military, search and rescue operations, industry, medicine, and the construction industry. Finally, thermal camera application has been shown using the thermal camera at the Faculty of Maritime Studies, and the advantages and challenges in practice are analyzed. Additionally, potential future applications of thermal cameras and their impact on different industries are considered.