The purpose of this study is to explore the possibilities of using crowdsourcing as a means of monitoring architectural and urban policy projects as a policy maker. The process of this study is as follows: First, we derive the concept and characteristics of crowdsourcing based policy monitoring through related theory and prior study review. Second, we analyze policy monitoring cases using

crowdsourcing, and draw implications for monitoring system development, operation and management. Third, we develop a prototype system for crowdsourcing based policy monitoring and apply it as a pilot case study to derive its performance and limitations.