Sustainable architecture is a comprehensive and cross-discipline area,which comprise from architectural design to material selection,as well as its sustainable use along the constructions time.Therefore,and reflecting the specific Chinese context,it was presented to author the possibility to investigate the current use of two Beijing 2008 Olympic Games buildings – USTB Gymnasium and CAU Gymnasium,after the event.With the purpose of identifying and tackling the main concerns regarding these spaces/constructions,it begins with collecting information from literature research of case studies.Consequently,it is gathered information of the current use by site visits and surveys,highlighting,subsequently,primary sustainable measure taken regarding design,material and technologies.As a consequence of fieldwork and interviews organised by the author,it was possible to obtain a general comprehension at the level of architectural decisions as well as the original intentions exposed by architects and progressive development within the post games alteration process.While together with developers,the aim was to get aware of not only concerns and respective countermeasures,but also feedback from users that could illustrate the most authentic image of buildings harnessing.Overall,always keeping an objective and critical sense was a key factor to analyse both positive and negative aspects of each Olympic building,ending up with a list of possible recommendations for improvements for future projects on the same subject.In short,the ultimate goal is to carry out a thorough study on a subject that is consistent and essential in todays China,making use of case studies as a “breakthrough point”,from an architectural view,to understand the sustainable use in buildings of this great event in Beijing,and eventually,reaching some relevant improvement suggestions.