This study deals with the methodology to evaluate an improved landscape of public space based on a landscape planning and design. We have some evaluation methods，but the public space is a place，where unspecified individuals travel，it is important for them to be satisfied. with a landscape In this study an urban riverscape in Hiroshima City is investigated as a case study. In order to make clear the evaluation and image structure of riverscape，Semantic Differential Method is adopted. The psychometric experiment was made on seventy three subjects and fifteen pieces of photographs of riverscape. Those photographs were taken in the direction of upper and lower stream on river revetment. The obtained main results are as follows. Semantic Differential Method is useful to understand how a landscape planning is realized and how a citizen assesses an improved landscape. And we could make clear landscape elements to compose image of riverscape.