CORBA逐渐成为面向对象分布式应用中间件的主要标准 ,但是 CORBA当前没有为容错提供相应的机制 .该文在比较各种容错方法的基础上 ,讨论了一种基于异步消息服务回调和查询模型的容错方法 .该方法使服务对象的副本可以并行地处理客户请求 ,提高了容错的性能 .该方法具有对服务对象透明、可以满足用户不同容错要求等特点 .文中还给出了这种方法在为遗留应用增加容错能力时的应用实例 . CORBA has gradually become the main standard of object-oriented distributed application middleware, but CORBA currently does not provide a mechanism for fault tolerance.This paper, based on the comparison of various fault-tolerant methods, discusses an asynchronous message service callback and query model Fault-tolerant method.This method makes the copy of the service object can process the client’s requests in parallel and enhances the performance of fault-tolerant.This method has the characteristics of being transparent to the service object and satisfying different users’ requirements of fault tolerance, Examples of applications where legacy applications increase fault tolerance.