Being capable of describing organic objectives such as snowflakes and leaf veins, the fractal geometry is suggested by Mandelbrot(1982) in order to depict the natural order lays beneath the chaotic and irregular impression. This movement of the field of modern mathematics has been identified as increasingly topical to the built environment as well. The new understanding offers potential for analyzing the complex nature of the spatial growth of cities, architecture design and cityscape assessment (Batty and Longley, 1994; Bovill, 1996; Hagerhall et al., 2004).The special interest in the cityscape aesthetics has motivated several attempts to investigate the potential of fractal analysis techniques for visual quality evaluation. Considering the complex and comprehensively composed streetscape, it is a critical issue for urban designers to make street features aesthetically ordered and visually coherent while still keeping the character and the variety. Our intuitive capacity for visual appreciation, including senses of 'rhyme', 'rhythm', 'balance' and 'harmony', can result in visual pleasure. Notably, while the similarity in the patterns and elements varies from the simple kind to more complex subsystems, it comprise 'a system of interesting affinity' which composes aesthetic coherence and visual pleasure (Carmona et al., 2003, p.131). In order to systematically evaluate the aesthetic order of streetscape, there have been a number of studies adopt the fractal analysis method as a new approach to investigate the relationship between cityscape's fractal character and the corresponding human perception of visual quality.Based on the fractal analysis methodologies and examinations for British townscape (Cooper, 2003; Cooper and Oskrochi, 2008), the aim of this research is to investigate the wider applicability of the relationship between fractal dimension and environmental perception for streetscape, and takes Taiwan as the case study area. The research focuses on two facets¡X1) physical domain and 2) psychological domain, starting by identifying the potential of fractal geometry to be applied in man-made environment and then three issues' the fractal dimension, streetscape and pedestrian perception.This study is one of the ongoing studies for environmental fractal analysis. It has initially identified and developed the correlations between fractal dimension, pedestrian perception and streetscape elements. It gives the confirmation that fractal dimension are strongly consistent with the level of environmental aesthetic attributes. This piece of research is regarded as preliminary in fractal study and therefore hopes that this work will encourage further studies aimed at investigating the relationship between fractal dimension and high quality urban spaces.