Abstract:[Objective] The temporal-spatial changes of wetland resources in Yantai City of Shandong Province in recent 30 years were studied to provide basic data and scientific basis for the rational utilization and conservation of wetland resources. [Methods] With RS and GIS, this paper took the TM images in 1986 and 1995, the ETM+ image in 2005 and the OLI image in 2015 as data sources, to interpret and extract the information of wetland resources in Yantai City, and to make quantitative analysis on the area of wetland resources, the change rate or transformation beween various types of wetlands. Upon which, the temporal and spatial variation of wetland resources in Yantai City in the latest 30 years were demonstrated. [Results] The total area of wetlands had an increasing trend year by year at a rate of 5.46 km2/a; The increment acreage attained 158.47 km2 in Yantai City for almost 30 years. In the process of wetland transformation, the shallow sea-water area still covered mostly. Other types of wetlands had different change processes. Among which, coastal tidal flat and estuarine wetland, declined year by year; Whereas, culture pond plus salt pan had been increased at yearly-averaged speed of 4.59 km2. River wetland exhibited a fluctuating trend. The area of reservoir or pond increased 35.8 km2 at a rate of 1.23 km2/a. The transformation between wetland types was less, but the conversion between wetlands and non-wetlands was strong in Yantai City. [Conclusion] Due to the interference of human activities, the temporal and spatial changes of wetland resources were very significant in Yantai City in recent 30 years, so we must take measures to strengthen the rational utilization and protection of wetland resources.