A maritime monitoring systemBased on WebGIS is designed tosolve the problemofbothDomestic and foreign maritime bureauuse UAV in marine law enforcement but they can’t achieve data sharingrapidly.The system is based on B / S architecture design,useOpenLayers as a WebGIS display layer development framework,equipped with MySQL database which storage space data and various types of information data.Including location information and video information which are transported by UAV associated with the geographic information system,making the display of the data more concrete. At the same time ,there are lots of function will be achieved by this system, such as the UAVmission intelligence operation, access to UAV real time,database query for video playback and track playback processing,etc.To make the maritime applications become real-time, efficient and comprehensive.