In order to unlock the potential of urban informatics we must establish collaborative platform to continue role of community interactions and communications closely for urban dwellers extending big data framework activities. As communities of the city develop by sharing opinions and feedbacks of Urban Informatics System in own groups, overall issues of privacy and anonymity would be resolved with more flexible and responsive behaviors of citizens. Also this enables citizens to act in mutual support and “sustainability" development of Urban Informatics System into actions would be developed depending on collaborative action required for concerted efforts. Citizens hold the ultimate key of success of Urban Informatics which we are still incubating and developing