从认识世界对地观测的本源出发，提出了空间信息的理论目标的概念模型——点源系统(PRS)，其根据综合信息场观点和离散目标观点来认识和处理原始混合的对地观测图像信息(RGIS)，可以根据不同尺度的点源，获取具有明确边界和位置属性的目标物体信息。并实现了该模型的几个应用工具——点源尺度变化模型、点源检索模型、点源位模型，完成海量数据信息提取和信息处理直至形成信息库存贮和检索的过程。

Starting with understanding the origin of the world,this paper points out a conceptual model of concrete and active theory object Point Resource System.Raw and compound Earth Observing Image Information(Remote Sensing GIS) is understood and processed according to the concept of Conformity Congregate Information Field and Discrete Object.Purposeful object information with definite boundary and position information is obtained by the size of the point source.What's more,several application tools point resource vary scale model,point resource retrieval model and point resource earth surface characteristic model have been implemented to fulfill the extraction and process of mass data information until the procedure of info storage and info retrieve is formed.