The adjustment of urban spaces to the necessitated usages which is resulted from the rapidly altering daily practices is a difficult process. Since the traces of that alteration are widely seen in the public spaces, the design of those spaces is need to be taken into account form a large perspective. In this regard, temporary usage of public space is an essential condition used for the re-organization and re-design of public open spaces in today.s urban areas. That allows us to reconsider public spaces in relation with time and space. This study intends to evaluate event organizations in open public spaces temporarily for different kinds of events (i.e. arts and culture, sports, science and education, recreation) and scrutinizes the temporary usage opportunities of open public spaces for events with a new method .Eventcheck'. This method corresponds with other known examples of urban design studies that use checklist approach such as .Placecheck and Chapacitycheck.. In addition, this method has been developed as an urban design guide that enables to evaluate the skills and needs for various actors (such as urban designers, artists and organizers) who are the parts of providing event organizations in open public spaces.In order to obtain actor.s preferences and needs about event organizations, a comprehensive pre-determined list of semi-structured questionnaires are prepared. İstanbul and İzmir are selected for place of interviews due to their distinctive cultural policies. Consequently, this research puts forward eventcheck method for improving temporary usage into open public spaces for event organizations.