We propose a case-based service request interpretation approach for digital homes. This approach starts the system construction from the view of software requirements engineering and a goal-driven approach is used to model service requests. The predefined goal model will be encapsulated in a case of a case base. The cases will be future selected and refined by performing a proposed case-based service request interpretation process. The system will base on the selected case to perform a series of actions to satisfy the service requests. Based on the case adaptation process, the system can adapt different user's service request and give a convenient interface for digital homes. We give some scenarios to demonstrate applications of the proposed approach.