Under the circumstance of earth observation data booming, it is important to develop an intelligent and automatic processing method for the geospatial data. Currently the OGC web services standard offer unique interfaces for the geospatial data planning, accessing, processing and publishing. This paper focuses on the Web processing model building and implementing - how to organize the distributed Web computing resources like workflows, OGC web services as a processing model. This paper presents a RESTful architecture for a loosely coupled processing model and the interoperation for the distributed Web resource. In the last, we give a user case of GOES-West image simulation process to testify the feasibility of the proposed processing model web.