A lot of different arguments have been done about urban historical texture in the literature of architecture and urbanism. Some considerations are done about urban historical texture in architecture and urbanism literature of IRAN up to now. However, they are scattered. Extent, variety and complexity of them have caused many difficulties in the Histology of the urban historic texture.For this purpose many studies in texture ground in different scientific. Theories, outlooks and conceptual framework of texture concept are considered. Many different observation and considerations were done from urban historical texture of Iran specific YAZD city. The elements, relationships, intermediates and etc, are explicated. These cases are collected and edited by descriptive-analytical method. Hierarchy model are made from them. Equivalent Counterpart elements and containing Counterpart elements are considered so that system and subsystem of the urban historical textures were explicated. In system theory base, the urban historical textures system was definite and was presented in model framework. It was used from induction and reduction cycle process and reverse. IT was edited detail to total after it was districted confidence results. Consequently this model can be highly recommended to use in Urbans historical texture.