Over the past few years, fifth generation (5G) commercialization has accelerated consumption upgrading, production efficiency and social harmony, taking the transformation of digital intellectualization and achieving high-quality development as the main objective. The rapid development of 5G has led to the advancement and integration of big data, cloud computing, artificial intelligence (AI) as well as other cross fields, such as chips and devices. The deep integration of communication technology (CT) , information technology (IT) and data technology (DT) has become an inevitable trend in the future. Compared with 5G, cross-domain and interdisciplinary IT (i.e., cross-domain technology supporting or influencing the information and communication development) will accelerate integration in sixth generation (6G) development, and play an important catalyst role. It is expected to break through the key challenges of ultra-large bandwidth, deterministic delay, low power consumption, low cost, high security, easy deployment and operation in the development of 6G, which will promote the society to the "digital twin" and "wisdom ubiquitous", and truly realize the "Metaverse" where the virtual and real world are integrated and interacted.