This invention relates to a method and
system for constructing a virtual cultural tourism scene based on a 3D model. The method includes: collecting real-time multimodal behavioral and physiological data streams of target users within a preset time window of the target virtual cultural tourism scene; extracting multimodal feature vectors; determining a
cognitive load state index using a
cognitive load comprehensive assessment model; adjusting the information flow density of the virtual scene presented to the target user based on comparison results of a preset
cognitive load comfort range to obtain a basic scene; calculating the correlation degree between the basic scene and the corresponding
group memory focus of the target virtual cultural tourism scene; and fusing the memory representation elements of at least one
group memory focus with a correlation degree greater than a preset correlation threshold into the basic scene to generate the final fused virtual cultural tourism scene. This constructs an immersive virtual cultural tourism scene that combines personalized comfort with a collective cultural depth.