With the continuous progress of science and technology,unmanned aerial vehicle(UAV)remote sensing technology has gradually emerged and been widely applied in various industries.Especially in the field of water con-servancy engineering surveying,UAV remote sensing technology has greatly improved the measurement accuracy.Therefore,the main application scope of UAV remote sensing technology in water conservancy engineering con-struction is analyzed.Combining specific cases,the application points of UAV remote sensing technology in water conservancy engineering surveying are elaborated,aiming to better cope with the surveying of complex areas,re-duce the difficulty of surveying and mapping work,and promote the overall development of China's surveying and mapping industry.