It's a trend and research hotspot of WebGIS to have a closer combination of Internet technology and GIS technology. After analyzing and comparing the WebGIS development technique, a realization technology based on ActiveX component is proposed, which is in order to take advantage of the Microsoft's COM/DCOM and construct a more efficient, flexible WebGIS system structure model. And put forward the system model of such WebGIS , finally, an application example adopt ArcIMS based on ActiveX technology is introduced, which confirms the feasibility.