The purpose of the study is to investigate the influence relationship between delivery app service quality factors, customer attitude, and continuous usability. In addition, in the relationship between them, the moderating effect according to the type of eating habit is studied together. At this time, detailed factors of delivery app service quality were divided into convenience, efficiency, information, product accuracy, and product guarantee. The survey period was conducted online from August 20 to August 25, 2021. Of the total questionnaires, 203 copies were used for analysis, excluding invalid questionnaires. As a result of the study, it was investigated that efficiency and product guarantee among service quality had a significant effect on customer attitude. In addition, it was investigated that customer attitudes had a significant effect on continuous use intention. In the results of the moderating effect analysis, it can be said that the relationship between service quality factors, customer attitude, and continuous usability differs depending on the eating habits of users. In particular, it was investigated that convenience, efficiency, and product guarantee among service quality had a significant effect on customer attitude in the case of regular eating habits. However, in the case of customers with irregular eating habits, it was investigated that information and product accuracy among service quality had a significant effect on customer attitudes.