Coastal water quality conditions have great influences on the ecological environment of tropical coastal regions. Conventional in-situ measuring approach is time consuming and laborious. The growing remote sensing data and techniques have become more widely used in estimating water quality parameters based on the reflection and absorption characteristics. The reflected spectral signals from the water body are easy to be disturbed or confused due to the uncertainty of cloud cover before they are recorded by remote sensors. Moreover, the atmospheric correction of remotely sensed data has always been one of the most difficult steps in quantitative remote sensing application research, especially in tropical cloudy environment. This project tries to improve the satellite-based water quality monitoring framework with the assistance of low-altitude remote remote platform, and the present study will preliminarily explore the feasibility and superiority of low-altitude spectral characteristics for monitoring water quality in coastal cloudy regions.