The invention discloses a multimedia projection system of a wearable intelligent ring. The multimedia projection system of the wearable intelligent ring comprises an external independent device and the wearable intelligent ring, wherein the external independent device consists of a large screen, a projector, a camera and a PC (Personal Computer); the camera is fixed above the projector, can shoot the large screen and can carry out data transmission with the camera through a WIFI (Wireless Fidelity) module mounted on the camera; the wearable intelligent ring comprises the ring, wherein an upper convex part is arranged on the top of the outer part of the ring, a laser emission head is embedded in the upper convex part, the side handle of the ring is provided with a small circuit board which can be fixed on the ring; and the small circuit board is provided with a left button, a right button, a button cell and a single chip microcomputer. The multimedia projection system is small, attractive, flexible and convenient in remote operation and suitable for popularizing and applying and has various functions.