This paper, first, briefly explained the usage of method in urban design process .then, configurative specifications of Mashhad\'s -one of the oldest and religious city of Iran- spaces are analyzed by space syntax methodology during three historical stages of its development (first stage, mashhad within the defensive wall limit; second stage, development of the city beyond defensive wall and construction of market, and the third stage, after street forming in 1940s), and the following results are to be used in the process of urban design. The urban spaces have shaped based on the structural logic. Manipulating or Intervening in space syntax method transforms the spatial structure of city. The analysis of urban space configuration, by using the “space syntax method”, enables the skillful society of urban designers to make the model which can predict the behavior in urban spaces.

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