Abstract: It is generally believed that the construction of sensing network has been one of major power driving new information times progressing,and data manipulation is an important topic in sensing network application.Although currently there are series of data fusion arithmetics and models available,their incapable of solving semantic heterogeneity in data or network are still obvious.Depend on characters of sensing network and geo-ontology,we firstly peopose a definition of spatial sensing network,then demonstrate an axiom model of geo-ontology base for spatial sensing network,finally apply our theoretical achievements in lake monitor field.It turns out that not only limit power of sensing network can be saved effectively,but semantic heterogeneity can be eliminated successfully.