Sustainable streetscape plays an important role in forming the visual image of sustainable cities, as it is one of the most important factors which helps in city success, and tourist attractions. However, there are many cities whose visual image is lacking the presence of correct and sustainable streetscape, which negatively affects the visual image of these cities, and consequently the place of those cities globally. In this context, the research aims to activate the role of sustainable streetscape as an approach to provide an attractive and safe sustainable urban environment, and to sustain the development process for the visual image of cities, especially in Iran, through focusing on the elements and basic principles of sustainable streetscape that should be taken into account to define sustainable streetscape. So that, the analytical study covers some international examples in applying the basic principles of sustainable streetscape in order to use it to develop streetscape of one of the main urban streets in Iran. The research concludes the importance of developing urban environment visual image in Iran, through directing urban planners and designers to the important role of streetscape in achieving sustainable development, in addition to identify the methods of application of sustainability in streetscape.