Aiming at the problems of low data transmission rate and difficulty in synchronization between receiver and transmitter in visible light communication(VLC) technology, an optical camera communication(OCC) system with color light-emitting diode(LED) array as transmitter and mobile camera as receiver is proposed. Firstly, a special frame structure was designed to solve the synchronization problem of the receiving and sending ends of the system, and an image processing algorithm was established to extract gray statistical characteristics of each channel of color LED to distinguish the color of LED. Then, the back propagation neural network classifier is introduced to improve the color recognition accuracy. Finally, the m pseudo-random sequence is used as the test data to measure the system communication bit error rate, and the impact of the transmitter refresh rate, camera deflection angle, transmission distance, LED color number on the bit error rate is studied. The experimental results show that the designed frame structure can ensure the stability of information transmission. The system can realize real-time communication with bit error rate of 10-6 magnitude and communication rate of 4.824 kb/s within 20~30 cm.