The human emotional responseis the result of the comprehensive processing of the environmental information received, among which the aural-visual information plays the most significant role. However, previous studies have not paid enough attention to the complex effects between environmental characteristics and human emotional responses. More important, existing theoretical efforts can hardly be applied to design practices. Taking five urban parks with obvious differences in aural-visual and functional characteristics in Chengdu ecological zone as examples, this study attempts to quantify the complex relationship between objective aural-visual characteristics, environmental functional characteristics, and human emotional responses so as to construct models of measuring human emotional responses. Research findings provide cues for developing design instructions on improving aural-visual qualities of urban parks that aim at facilitating people’s positive emotions. This study explores a humanized way to improve the environmental quality of urban parks, concretizes the practices of landscape perception research centered around “emotions, experiences, and feelings”, and makes an empirical contribution to the construction of urban open space design based on multi-sensory perception to serve the improvement of people’s landscape experiences.