An Earth Observation (EO) integration framework is an application integration solution for sup-porting the development and execution of EO services. EO services are based on the intensive use of large data sets from space. They process raw EO data sets into increasingly specialized products until a certain level of quality is achieved. This processing requires the tight cooperation of several distributed experts, and intensive computation across a coordinated sequence of both, interactive and automatic processing steps. Appropriate examples for such EO services are the generation of weather forecasts, forest fire detection, and oil slick monitoring. EO services can be characterized as highly flexible structures, which constantly need to be adapted to evolving spacecraft and proc-essing technologies. We suggest a model-driven EO integration framework solution that adequately copes with the flexible development, customization, and execution of reusable EO services. Our prototype includes a comprehensive integration model that accurately handles system metadata throughout the software life cycle, and significantly enhances the EO service development process in terms of quality, reuse, and adaptability. The prototype employs repository technology for man-aging model related issues, as well as workflow and Web service technology for execution pur-poses. It is mainly built upon commercial products, which are seamlessly combined by appropriate 'glue' components.