Abstract: This study aimed to examine the utilization of historic city for sustainability tourisms in Thailand, which had introduce very much by water cultuural heritage, more than 75 of water based city. Floating Market as a cultural Heritage had noticed with component of community, which is very important to utilize local economic and urban tourism devebpment in nowadays. In this study, it is argued that (1) at the inception of general market of the cities, there were no major place for commercial, but on the water side. (2) Form and component of floating market are s and different tor sustainability tourism development in Thailand. 3) The vahue of floating market were formed in various finctions as follows, 1) the center and landmark of community, 2) cultural heritage, 3) curural architecture, 4) cultural hndscape, and 5) cultural social it brings to sustainable tourism development in city for other countri