The current equipment management information systems only provide unique function and have bad compatibility, thus are not suitable for resource sharing. In order to solve this problem, the SOI-based equipment management information system architecture is proposed. Considering the requirements of the army and the real applications, the characteristics of the SOI, the requirements and objectives of the equipment management are extensively studied. The key technologies in realizing the architecture include: data resource conformity, service providing and service orchestration. The proposed architecture can not only make full use of the current system, but can also adapt to new functions in the future.