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Ubiquitous robotics has recently been proposed and many methods have been suggested to implement this concept. In many cases, software modularization and middleware technology are adopted. However, different middlewares are used for each case since there is no standard for such a technology. Thus, the implemented robot space keeps a ubiquitous concept only under its own standard. To remedy this problem, this paper presents a connection method of two middlewares for securing the compatibility between two ubiquitous robot spaces. In the proposed method, the target middlewares are RT-Middleware of Japan and CAMUS of South Korea. By making a bridge between two middlewares, the service provided by the RT-Middleware side can be available to the CAMUS side and also the service provided by the CAMUS side can be used by the RT-Middleware side. Experimental results using a Pioneer robot equipped with the NAV200 positioning system are included to verify the performance of the proposed method. [ABSTRACT FROM AUTHOR]