Abstract: Urban dew is a non-negligible condensed water resource and humidity origin. To research its ecological effect is of great significance. This paper summarized the recent research advances on urban dew and its ecological effect, with the focus on the collection of urban dew,its amount under effects of urban ecological environment,chemical ecology,and simulation and modeling.The formation of urban dew was obviously affected by urban ecological environment, e.g., the dew amount tended to decrease, and its chemical components were highly related to the urban atmospheric environment. Limited studies have been done for the simulation and modeling of urban dew.The issues about urban dew and its ecological effect r esearch were listed, and some further research trends were prospected.

Key words: Hangzhou, West Lake, Water body, Heterotrophic bacteria, Restricting factors