The introduction of new intelligence into a smart car needs to be combined with a human assistance system, and playing a virtual role can gain insight into the user's feelings. With the advent of the 5G era, AI robots combine big data, blockchain, cloud computing and other technologies to integrate vehicle software and hardware equipment to present a "virtual secretary" in a mixed reality mode, making smart cars seem to be infused with soul Restart a new life. In this research, the business model will explore the functions that virtual secretaries should have, and use quality functions to develop software technology development, and obtain virtual secretaries with socialization, efficiency, communication, relationship, evolution, technology, assistance, resources, exclusive and other characteristics to provide Reference for the development of digital technology. The virtual secretary will enable users to experience intelligent services that integrate virtual and real, and link the two-way multilateral platform of the Internet of Vehicles, To open up new user terminals and consumption paths, apply biometric technology and blockchain encryption functions, and use AI smart decision-making to improve service quality. The results of the study found that the advancement of digital technology will change people’s living habits. Shopping tends to shift from one-stop service to self-service consumption, and the dependence on online infotainment services is increasing.