This study aims to explore how emotion-driven interaction design affects user experience, particularly in the context of regional public brand app design. From a user experience perspective, this paper focuses on analyzing the role of emotional factors in the user-app interaction process and how design optimization can enhance emotional experience and satisfaction. First, a literature review was conducted to analyze the relationship between user emotional experience and app design. Then, using case analysis and cluster analysis, relevant market products were investigated, and users’ emotional experience elements were categorized into visceral, behavioral, and reflective levels. The extracted design elements were combined with the user experience honeycomb model to propose design principles for regional public brand apps under the user emotional experience perspective. Following this, user behavior flow analysis was used to identify design points from three dimensions of emotional experience, leading to specific design strategies. Ultimately, a regional public brand app design scheme was developed and evaluated for user satisfaction. The results indicate that integrating user emotional experience theory into the design of regional public brand apps meets users’ diverse emotional needs from sensory, interactive, and emotional dimensions. This integration not only enhances the effectiveness and sustainability of sales and communication for regional public brands but also meets the new development requirements of the agricultural industry.