The norms of spatial value prioritized the purpose of functional and economical values in the past industrial era. It has now changed to prioritize the purpose of emotional and experience-oriented values in today’s knowledge and information oriented society. Accordingly, a marketing concept that actively utilizes experience was implemented to sat- isfy the diversified consumer demands of today. Experience design is a design that uses experiential factors of the human sensory organs to go through the process of cognition and stimulate the emotions based on the human conceptual system. Spatial experience acts as a stimulant for users’ emotions. Emotional stimulus places greater meaning in accordance with space. Public Space must strive to become a space where publicity and decency is realized. However, public space in modern city is seeing a declining trend of functionality despite an increase of quantitative supply. The public space must induce diverse activities and act as a chapter for mutual interaction and a user-oriented realm. Therefore, there is the need to study a theoretical foundation on experience design, which can increase and augment the value that public space should attempt to replicate. Nonetheless, the study on experience design is still new theory, and its field is rather focused on web design or product design fields instead of space design. This paper and those dealing with similar topics also mostly focus on the trend of expression resolved in architecture, while emphasizing visual effects exclusively. This study has the purpose of presenting the value of the design that public space must shoot for, by analyzing the tendency of experience design and expressive traits that occur in public spaces. Firstly, this paper will study the background of experiential designing and the trend of designing of global public spaces, in order to understand the situation where users obtain experience. Secondly, it will analyze what factors of experiential design the users utilize to experience public spaces, in order to comprehend the correlation between the increase of value in public space and expressive traits of experience design. For the third step, the paper will peer and focus into the design factors applied according to external and internal spaces when designing experience, along with expressive methods and traits used in the process. This is due to the fact that human experience differs regarding the subject in which to apply the design based on the interior and exterior of space, as well as the expressive method used in the process. The scope of this case study regarding this paper is limited to public spaces that have actually been utilized since the 1980s, when the concept of experience began to emerge. This paper studies the human experience formed in space, and proceeds to study the contents founded on the experience absorbed by actually visiting the sites. Therefore, case studies have been researched based on the contents that the researcher has directly experienced on site. The methodology of this study in achieving the above goals is to contemplate preceding studies and theoretical documents. This methodology will involve looking into the concept and value norms of public space, and to comprehend the expressive traits of experience design. Based on the aforementioned contents, the paper studies the cases mentioned above and analyzes trends that appear in public spaces from the aspect of experience design. Finally, the paper studies situations where the expressive traits of experience design differed according to indoor and outdoor spaces. The ultimate goal is to derive the conclusion on how experience design is applied with what type of expressive traits in the enhancement of public space’s value. The paper is also expected to be utilized as basic data with which readers can design public spaces where users can actively participate in spaces and create positive experiences.