Building model modification interaction method, system and terminal based on virtual reality technology

The invention discloses a virtual reality technology-based building model modification interaction method and system and a terminal, relates to the field of building design modeling, and solves the problem that a user cannot modify the form and composition of virtual building elements in the related art. The technical scheme is characterized in that a virtual building scene with a three-dimensional building model and environment information is constructed; and acquiring a user voice instruction, identifying the user voice instruction to execute an interaction operation correspondingly configured in the virtual building scene, detecting a trigger instruction generated by a user by using the handheld interaction device, and modifying the virtual building elements of the virtual building scene according to the interaction operation corresponding to the user voice instruction and the trigger instruction. According to the invention, the corresponding interaction operation is identified based on the voice instructi