RBAC (Role Based Access Control) was added the concept of the role which user can have access to resources based on the role of the user, and it increased efficiency and expandability. But, evolution of computing power and internet technology has caused the up rise of the dynamic environments, in accordance with it, it will be expected to require a dynamic access control model considering various elements. In this paper, we propose DRBAC (Dynamic RBAC) model in intelligent Home (i-Home). This is an access control model suitable for user-oriented service in i-Home. In order to consider dynamic environment in the existing RBAC models, the proposed model executes assignments user-role and permission-role based on context. In addition, the proposed model provides scalable access control policies which are suitable for the characteristics of intelligent environment as considering the user location information as a temporary constraints condition. Furthermore, we design and implement WSNM (Wireless Sensor Network Module) for its services. Finally, the proposed model provides flexible and efficient authentication method which applied Domain-Group concept as well as user / device authentication.