Our researches are conducted in the following main streams: (1) Perception characteristics of multimedia real and synthetic worlds. (2) Performance measures of multimedia modeling. (3) Essential multimedia synchronization models. (4) Hyperworld modeling. The basic characteristic of a hyperworld is the direct mapping between multimedia information worlds and real worlds. Drastic efficiency and exactness increase is the primary feature of direct mappings in general. How to effectively model the direct mapping between the multimedia information worlds and the real worlds is key to hyperworld modeling.