With the help of metaverse technology, the new media industry will undergo profound changes, and immersive media will become a new direction for the development of the new media industry, which will generate innovative reporting scenarios. The theoretical and technical foundations of learner portrait construction are expounded. And according to the data fields of the smart classroom learning platform and the characteristics of primary school science classrooms, a model for primary and secondary school science learners in the smart classroom is designed, and the students are determined around the "basic attribute characteristics-psychological attribute characteristics - behavior attribute characteristics - ability attribute characteristics. The five feature dimensions of "result attribute characteristics" are used to profile learners. Using big data mining technology and integrating artificial intelligence technology, the integration of multi-source information data is realized, and a five-dimensional digital twin system is constructed.