Objective : This study was conducted to develop an assessment tool for infection control activities to prevent infectious respiratory diseases in the general public aged 19 years and above. Measuring infection control activities in daily life activities has the advantages of improving personal hygiene, preventing respiratory infections and their transmission, and enabling early recognition of infectious diseases and rapid response to them to prevent their spread to local communities, which would reduce fear of respiratory infectious diseases socially and would contribute to the improvement of public health and quality of life. We felt the need to develop a tool for assessing infection control activities, including the areas of contact management and community restriction, by addressing the problems that existed in previous studies and reflecting the rapidly changing current environment. Method : From May 2022 to July 2022, previous studies were analyzed to come up with items that must be included in the assessment tool. After the preliminary assessment items were prepared through the first professional focus group meeting with three nurses, one professor, and one doctor who specialized in infection control, the importance and the frequency of performance of the assessment were investigated. Then through the second professional focus group meeting, similar functions and simultaneously performed activities were investigated to select the preliminary assessment items. After the preliminary assessment items were selected, a preliminary survey of 232 adults aged 19 years and above was conducted and Rasch analysis was performed to verify the validity of the items. The final assessment items were derived by analyzing the person and item fit, the difficulty of the items, the rating scale, and the separation reliability. Results : Of the 232 subjects, five (2.15%) were found to be ineligible. From the analysis of the fit of the assessment items with the 227 eligible subjects (excluding the five ineligible subjects), three items were judged as misfit items. The analysis of the difficulty of the items showed that the item “Do you carry disposable gloves when you go out?” was very difficult to do. The rating scale analysis showed that the three-point scale is more suitable than the five-point scale and that the separation reliability was 0.99. Finally, four categories (human surveillance, patient management, contact management, and community restriction) and 28 items were selected. Conclusion : For the infection control assessment tool, four categories and 28 items were finally selected, and a three-point Likert scale was developed. Follow-up studies are needed to prove the concurrent validity of the tool through its correlation with other assessment tools and to analyze factors that influence infection control activities.