The interaction between man and nature causes people to have different preferences for their surrounding environment, and pleasant landscapes can bring both physical and mental benefits to people. Previous studies have demonstrated the relationship between moods and landscape preferences, and this study sought to explore the landscape preferences of college students under different moods. A total of 1,034 students participated in the survey, recovering 1,022 valid questionnaires. The Profile of Mood States (POMS) scale was used to evaluate the mental status of each respondent. The study on landscape characteristics proceeded in two steps (comprising four gradients): landscape naturalness and landscape visual openness. The research results show that under natural landscape conditions, college students in a fatigued state have a greater preference for the second-gradient (higher naturalness) landscape environment; under the conditions of landscape visual openness, college students in an indignant state have a greater preference for the second-gradient (relatively private) landscapes. These findings have significance for exploring the rehabilitation function of landscape architecture and have a guiding role for future landscape design.

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has called for the "suspension of classes without suspension of learning". Online learning enabled college students to remain in isolation at home during the epidemic. However, it also placed unprecedented pressure on college students. Horticultural activities have been proven effective in alleviating negative emotions. We examined whether brief horticultural activities could effectively relieve stress in college students engaging in long-term online learning during the epidemic. The study was divided into two mental state data of 380 participants were obtained via self-assessment and a standard scale. To verify reliability, 72 participants completed the second stage, which used brain waves and desktop operation tasks to obtain physiological and ability index data, after resuming school. Results showed that participation in psychological pressure and restored brain activity in college students who had been involved in long-term online learning during the epidemic. We encourage learners, especially those who are studying online at home for the long term due to the epidemic, to place as many green plants as possible within their line of sight to increase their contact with plants.