With the development of computer technology, the computer application under distributed environment has become a trend of development. However, the even higher requirement of the data consistency and integrality under the distributed environment makes the traditional transaction process technology incompetent. To meet the new challenge, the Object Transaction Service model for distributed application environment was proposed, it combines both the traditional transaction process technology and the distributed object technology. The Object Transaction Management System (OTMS) we implemented was based on the OTS Model, which provides full capability of transaction service and management. Both the theory and the concrete implement technology of Object Transaction Management System are presented in this paper.