Abstract: Digital twin technology has now received attention from various fields around the world, especially the research of digital twin technology based on MBSE is a hot spot in the field of international systems engineering. The common problem commonly encountered in the current implementation of digital twin technology is that the digital twin systems are all dedicated systems and lack versatility. At the same time, the related digital twin models built at the same time lack a unified operating format standard, so they cannot be replicated between different users, resulting in a lot of waste of intellectual resources. This article starts with the operating system design principles, provides a new idea for the construction of a unified operating platform for the digital twin model, and takes the construction of the satellite digital twin system as an example to verify the universality of the model operating system for the construction of the digital twin system.

Key words: model operating system, satellite, digital twin, model-based system engineering, MBSE