With the rapid development of hi-tech garden and its urgent needs to strengthen the information construction and application, a 2D/3D integrated digital garden geographic information platform of B/S model was proposed. The GIS technology and SOA architecture was applied. Started from the analysis of the contents of digital garden platform, this essay described the design of the three-tiered structure platform and its main functions, and explored the key technologies of 2D/3D integration, information sharing, web services, etc in platform development. Finally the prototype platform was built and proved its availability and efficiency.