The direction of “public art” has changed according to changes in the way it views “public”. Today, “Public Art” aims to be a “new genre of public art” theorized by Susan Lacy. According to the report, ‘Public Art' shows the value of art's existence to the audience in the most democratic way. In other words, we aim for art for everyone. In addition, public art can lead to various discourse to achieve the goal of contributing to public life. Therefore, many people expect that public art can play a big role in forming a democratic society. In fact, attempts are being made to actively utilize “public art” in Korea. However, it has not achieved as much as expected. Most of all, “sustainability” has emerged as an important topic. This paper noted the concept of ‘public environmental art', which provided the basis for the way humans and nature can coexist, with the emphasis on ‘sustainable art'. Among them, we looked at Fritz Haeg's “Edible Estates”, which was recognized for its artistic value together while deepening and expanding the social functions of public art. It is a project that proved ‘Art for All' by recognizing the importance of art museum, audience and work relationship. There is also an attempt to pursue “public environmental art” in Korea, which is meaningful to the Korean public art community. Public art should take precedence over planning that melts with the lives of places and citizens. As in the case of Korea, it is important to create an environment where citizens can induce participation not by vertical-oriented policies but by their own will. The “Edible Estates” succeeded in creating a place where people naturally gather, not artificially. Also, in order for public art not to lose its artistic value, we have to think about the diversity of public art themes. All methods should be considered in a way that is consistent with the region currently seeking to utilize public art. Above all, “Edible Estates”, which proves the role of public art that adds meaning to “art for all”, tells us what sustainable public art is and where to move forward. It conveys the importance of the role of public art for relatively marginalized citizens in art genres that only a few can enjoy.