The present invention relates to a peripheral device for image display, which comprises a hollow spot for holding the peripheral device, which then comprises a base and a shaft, wherein the shaft was located on the base, of which the shaft and the slot are a hole and shaft assembly case and the shaft maintains its degree of freedom in the slot, wherein the base can not only rotate but also slide. In addition, the base comprises at least one positioning hole and the image display device comprises at least one positioning pin, when the positioning hole is fitted by the positioning pin, the degree of freedom of the rotation is thus restricted. In comparison with prior art, the ease of use is obvious, and the design flexibility is abundant.