Based on the current status of online monitoring technology of water quality,this paper summarizes development of online monitoring technology with full-spectrum.The full-spectrum technology is widely used in real-time monitoring of water body for pollution source and surface water because of its many advantages such as no chemical reagents,fast analysis speed,lower cost,no secondary pollution and multi-parameter simultaneous measurement.Based on water quality parameter inversion method of random forest algorithm and XGBoost algorithm,an accurate inversion prediction and analysis of water quality multi-parameter can be realized.The current online monitoring of water quality is undergoing a digital transformation,and full-spectrum AI technology is one of new online monitoring technologies of water quality with most development significance and value due to its convenience,accuracy,real-time and intelligence.This paper describes the research progress and application of full-spectrum analysis technology in the field of water quality monitoring.