A device for mixed reality includes a base, a curved mirror, a first holder, and a second holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed on the base, disposed in front of the concave surface and within a focal length of the curved mirror, and configured to support a portable apparatus to be oriented at an angle. The second holder is disposed on the base and supports the curved mirror to face the portable apparatus.