Abstract: In order to solve the related problems about assessment of shallow groundwater potential in small scale areas and arid bedrock island areas, we take the Island in the Pearl River estuary as an example. The GF-1 data, DEM data and others are used as data sources. Lithology index, relief index, slope index, vegetation-fraction index, land-temperature index, water-density index, soil-humility index are used as extraction indexes. A remote sensing model of shallow groundwater potential is constructed. The results of 5-level charts of assessment of shallow groundwater potential are obtained. The results are verified according to the water yield of the wells and the discharge of the springs. The results show that the assessment results can meet the requirements of error precision. This method can be used to assess shallow groundwater potential in small scale islands.