DFG is a kind of specialization application grid supporting forest resource information management and forestry eco-construction projects, which should be the most important information infrastructure in the forestry sector. Researchers have achieved many results in both grid core technology and Grid applications after four years working. Researchers have developed a grid environment. Some characteristics of the DFG include specialized grid resource management, business logic development and execution engine of grid applications. Using above technology, researchers can construct multi-level system for forestry subject applications with different aims. By means of grid technology, DFG integrates the data resources of forest and forestry eco-construction projects in four levels, namely state, province, city and county. The data resources are heterogeneous in nature, e.g., remote sensing images, vector data, thematic attribute data, etc. Thematic grid services, such as data resource services, spatial information analysis services, online statistic computing services, have been developed, which realize the sharing and usage of forestry information resources extensively and in depth. Researchers have built the forest resource monitoring system and grain for green project analysis and management system in both national and provincial level, which become important management tools for forestry resource information management and forestry eco-construction projects.