An aquatic eco-security monitoring system is the basic and primary work providing fundamental data in order to protect and restore aquatic eco-environment.Aquatic eco-security monitoring is to assess the relevant factors about aquatic environment and habitat,including atmosphere,soil,biology,and aspects of human influences.It emphasizes water quality and biology.The paper discussed the current situation about aquatic eco-security monitoring in Poyang Lake and try to analysis its characters and deficiencies.In order to make the monitoring work better,the paper gives five suggestions to form a data sharing mechanism,which are to improve the aquatic eco-security monitoring system,to divide the monitoring system into subareas,to expand the number of monitoring spots(especially the remote sensing and wireless monitoring spots),to enlarge the scope of monitoring aspects(develop from water quality to water ecology),and to construct the data platform of aquatic eco-monitoring in Poyang Lake.