In the aftermath of the COVID-19 pandemic, the hospitality industry faces multiple challenges, including declining performance and high-pressure work environments characterized by frequent human interactions. This study explores the impact of indoor fragrances on the quality of life of highly stressed employees in the hospitality industry, emphasizing the crucial role of indoor air quality. The primary objective is to promote sustainable self-care practices among employees in the hospitality sector, fostering the long-term development of Taiwan’s hospitality industry. A questionnaire survey was conducted with employees from an International Tourist Hotel in Taipei, Taiwan, using snowball sampling for participant selection. Research tools included citrus fragrance essential oils, the Perceived Stress Scale, and the Quality of Life Scale. Findings indicate that indoor aroma significantly influences stress regulation, which, in turn, affects the overall quality of life of hospitality employees. Key areas of focus include general health, physical health, and environmental quality. This study provides practical recommendations for hospitality managers in Taiwan, such as managing employee stress effectively, enhancing environmental quality through indoor aroma design, and incorporating these strategies into human resource training programs. The results underscore the importance of maintaining high indoor air quality to improve the quality of life for workers in the hospitality sector.