In the Software Engineering (SE) domain, the Model Driven Engineering (MDE) paradigm focuses on using models as main software artifacts to provide a full description of software systems and on automating model manipulation with tools. Model management concerns a set of features allowing representing, creating, storing and manipulating models. Nowadays, the needs of models designers in terms of management process and products are diverse. Modeling tools are not complete because there is no consensus about models needs and uses. To remedy the heterogeneity and the functional limitations of models management tools, we propose a service-oriented approach for model management for the creation of modeling environments adapted to the needs of designers. The considered needs are related in two abstract levels: the operational and the organizational level.