The invention discloses a virtual-scene interaction design system of improving mobile-end experience and a method thereof. The virtual-scene interaction design system includes a design subsystem and an experience subsystem. According to the design subsystem, maximum loads of a mobile device are estimated according to performance parameters of the mobile device; and a design space is automatically refined according to a set design layout to be divided into a series of small spaces, and corresponding interactivity parameters are provided for each small space according to the maximum loads of the mobile device to realize real-time rendering of a virtual scene in each small space. The experience subsystem includes a plurality of mobile virtual-reality glasses and motion sensing devices, and realizes roaming and immersion experience of the virtual scene. According to the virtual-scene interaction design system, mutual association of design and experience is realized, traditional virtual-scene design modes are changed, and efficiency and usability of design are improved.