The generation and propagation of internal wave occurs beneath the sea water, conventional methods such as field observations are restrained by weather conditions as well as other factors, it is difficult for researchers to get enough valid data. Moderate-resolution imaging spectroradiometer (MODIS) become the important research data sources of internal wave because of its large coverage, high temporal resolution, freedom data download, etc. A wide range observation of internal wave is possible with it. Based on data from MODIS, study on internal wave is conducted from June 2010 to June 2012 in South China Sea (0°N~23°N,102°E~121°E). A statistical analysis of temporal and spatial characteristics of internal waves is given. The results show that internal wave generates with a high frequency in the northwestern South China Sea, especially around Dongsha Atoll area which originates from Luzon Strait. In areas around 115°E east to Hainan Island, crest of waves have an obvious distinct characteristics from the waves of Dongsha Atoll, it is possible that there are local generation of internal wave. The temporal distribution of internal wave shows that most of internal waves are observed in summer and observation comes to the least in winter.