The market share of the Wellness Hotel market is rapidly increasing due to the desire for relaxation due to the stress experienced by modern people and the conversion of hotels into Staycations. Accordingly, hotel companies seek to gain a competitive advantage by improving service quality. This study attempted to contribute to revitalizing the Wellness Hotel market by analyzing the service quality of Wellness Hotels in more depth, finding ways to meet customers' needs, and proposing ways to improve service quality. As a specific research method for this, the items to be used for analysis are derived through the five measurement models of SERVQUAL, and the quality factors of each item are classified through the Kano model. Afterwards, the results are substituted into the HOQ matrix to derive service quality improvement priorities, and the research results are presented through this. As a result of the study, customers generally preferred customized services according to individual characteristics, and the higher the quality of the wellness program and facilities, the higher the level of satisfaction. To address these customer needs, 19 technical measures were presented in order of priority to provide an effective service quality improvement plan. This study has practical implications for improving service quality by presenting specific solutions for each customer's needs, and has academic implications for theoretical expansion of the wellness research field using the relevant research techniques.