This paper introduces DOOViE (Distributed Object-Oriented Virtual Environment), which is the framework to ease the construction of multi-user virtual environment over the network. The DOOViE concepts are aimed at the cyberspace applications that provide multiple services over the network. DOOViE concepts are based on the object-oriented paradigm. As the high-level component in the hierarchy of DOOViE concepts, we define a service block - unit server/client model to provide a specific service, and a database to be shared among the service blocks. The target system is composed of a set of service blocks and databases. Since a service block is highly independent of others, a set of service blocks can be constructed on distributed machines over the network as well as on a single machine. This approach allows the reusability of these high-level components, and makes the extension of the whole system easier.We implemented Webber, a prototype of the DOOViE concepts both as a proof of the concepts and as a way of investigating the tradeoff between the computational resource and the communication resource that is inherent in the distributed system.