District 1 of Tehran had experienced many changes during the past few decades and many of these changes had included few tangible matters, and never considered the public‟ s concept of urban system Pattern. The present study tried to explain the Pattern language system of district 1 of Tehran, based on Christopher Alexander‟ s theory of Pattern language and adapt this theory to the public‟ s concepts. This purpose was done by examining different theories belonging to prominent theoreticians, interviews, and maps obtained from the public and adapting them to the data of district 1 urban geographic system, live Patterns were obtained according to Pattern language theory. According to the findings of the research, among five major indexes of perceptual organization (node, edge, landmark, path, and district) from Kevin Lynch‟ s view, nodes had more importance to the people of District 1, and other indexes stood at lower levels of importance. Based on a 4-page format that was used for the first time Nafeh in her thesis at Waterloo university, in field study format, these nodes were surveyed and analyzed by interviewing team on the pages, and consequently, 37 graduals and reticulated live Patterns were obtained. Since these 37 Patterns were based on the public‟ s concepts, they had the characteristics of being live and natural as well.