With development of the solid state light source, the high power LED was widely applied in the illumination. The indoor visible light communication system has broad application combining both the illumination and communication. In order to meet the requirement of indoor illumination and communication, a full duplex communication system was structured by designing the transmitter, receiver and interface module based on the intensity modulation and direct detection modulation. The channel model was analyzed. The actual intensity distribution and the reliable communication distance of the one-way link were measured. The experiment proved the feasibility and reliability of the system.