This poster presents a Beyond5G/6G functional architecture for creating new services by combining various functional groups in Beyond5G/6G. This functional architecture is composed of a service enabler which mediates between function groups to facilitate service development and an orchestrator which optimally combines function groups. As an application example of this architecture, we introduce a digital twin orchestrator that creates services by linking different digital twins, and power-saving control technology for O-RAN radio base stations using people's flow data analysis and NTN as a bypass route.