The coastal areas of Ca Mau province are most affected by natural disasters, especially the impact of climate change and the rise of sea level. This study aims to evaluate the applicability of Google Earth Engine (GEE) platform to establish a map of forest status in Ca Mau Province from the year 2005 to 2017. In order to determine the status of mangrove and shrimp forests during the duration period, the researchers have developed a method using the NDVI index value and the change in the threshold values of 13 sets of image data; including Landsat 7 (2005-2013), Landsat 8 (2014-2015) and Sentinel-2A (2015-2017). The research aims to indicate the possibility of using the two types of Landsat and Sentinel-2A images in forest land mapping. The result accuracy of the research was assessed by comparing with the forest area reported in the Ca Mau Provincial Statistical Yearbook in 2016. The area of mangroves exhibited the highest value in year 2005 (35,897.52 ha) and the lowest value in year 2017 (17,668.39 ha). It is shown that the area of shrimp forest was highest in year 2014 (39,062.03 ha) and it had the lowest area in year 2011 (22,046.92 ha). The area of mangroves and shrimp forests are mainly distributed in three districts: Ngoc Hien, Nam Can and Dam Doi. This study has shown promising results to be the first research to apply GEE-based Landsat and Sentinel-2A data to monitor the forest area change in Ca Mau province