关键词: MDA, SOA，云计算，模型，构件，构件组装

Abstract: Cloud computing is only effective to specific business enterprises and units that match particular conditions.It isn't a good choice to those business enterprises which hope to acquire better competition ability. Although service oriented structure(SOA) helps business enterprise to quickly carry out a system integration, it is still difficult for looking for and utilizing services along with the increment of the service amount So SOA isn` t a good choice either. Model driven architecture(MDA) provides business application platform for the business enterprise with methodology and stanlord independent to technical realization. The application to model-driven components and management to model data- base and component database will greatly support a business enterprise information-based.

Key words: MDA, SOA, Cloud computing, Model, Component, Component assembly