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Digital Addressable Lighting Interface (DALI) intelligent lighting system have been widely used for its specialty, flexibility and low cost, but at the same the small size of the DALI lighting system and other shortcomings limit its extension and application. As an advanced intelligent building technology, the KNX bus has been paid as much attention in recent years, and successfully applied in domestic and large public facilities. By combining with the characteristics of DALI and Konnex (KNX) system, designing a gateway based on DALI and KNX communication protocol can complete the DALI protocol and KNX transformation, and realize the integration of KNX system and DALI intelligent lighting system. This paper introduces the overall architecture of the gateway, the design of system software and hardware architecture, and the test of gateway’s functionality and performance.