In the old administrative registration system, the location of real estate was determined by addresses and the rights of many citizens were lost and some were unjustly occupied. The master plan of cadastre has been quite successful in most countries. In our country, this competence was entrusted to the State Organization for Registration Documents and Real estates, the administrative part of the judiciary, which, after several years, did not achieve complete success in measuring Real estates. This descriptive-analytical study seeks to investigate the nature and legal effects of cadastre in the Iranian administrative registration system and to identify the reasons for the failure of this legislative challenge in the Comprehensive Law of Cadastre . Despite the legal explicitness of the need to determine the boundaries of all real estates in the country, unfortunately, this action has not been realized so far. While in developed countries, all aspects of land management and registration are considered and they benefit from the benefits of multi-purpose cadastre implementation in all organizations and bodies. On the other hand, cadastral affairs in Iran are entrusted to the State Organization for Registration Documents and Real estates , which is an administrative institution under the jurisdiction of the judiciary. "Due to its quasi-governmental management structure, it has lacked efficiency in administrative and executive affairs. Therefore, it is necessary—drawing upon the successful experiences of other countries—to seek assistance from a competent and capable private sector."