This study compares and analyzes design status according to the visual, structural, and non-visible characteristics of the Korea One-pyeong Garden Expo, Gyeonggi Garden Culture Expo, and the Seoul Garden Show. The purpose of this study is to identify the design characteristics of the works exhibited at the garden expo and to present the initial study among the case studies conducted in the early stage of the domestic garden expo while providing relevant information to other local governments that will oversee future garden expos. Visual characteristics included plantations, materials, and colors, while structural characteristics included the plane, entrance, moving path, and edge. Non-visible features included the subject and cost. Collectively, garden works used more artificial materials than natural materials. Depending on whether the garden was to be maintained, it was necessary to choose species that were easy to maintain and that met the conditions of growth. Floor materials mainly included crushed stone, soil cement, bark, granite slate, and volcanic stone. Structurally, most gardens contained formal planes, closed entrances, and closed-type boundaries. The circular and regression lines were often transformed into straight or curved lines. Garden themes differed depending on the theme of each garden exposition, but there were also many universal themes (e.g., “resting through the garden”). Costs had not yet been set for the garden exposition’s budget.