This paper explains the development of a concurrent engineering system for the design of composite structures. The concurrent engineering system is developed to meet the demand for the better quality products with lower production cost and time. In this study, to compose the architecture of concurrent engineering system, the commercial and non-commercial programs related to design and analysis of composite structures are surveyed and classified. The concurrent engineering system includes various design modules such as design/analysis of composite structures using CLPT and finite-element method (FEM), buckling and postbuckling analysis, then-no-elastic analysis of carbon-carbon composite and optimum design using expert system. For the integration and management of softwares, a graphic-based design environment that provides multi-tasking and graphic user interface capability is built.