In order to achieve a stable, isochronous and synchronous multi-coupled chaos communication, a bidirectional chaos communication system and a multi-coupled chaos synchronization model using optoelectronic feedback delay are proposed. The time delay and chaos modulation encryption technology are introduced to increase the security of the system. The synchronization characteristics, safety performances and communication performances of the system are numerically analyzed. The results show that the stable isochronous synchronization can be observed after a very short time. What′s more, the changes of the delay time, powers of information signals, powers of laser optical signals and phases have not bad influences on the system qualities, namely these parameters can be used as keys to improve the security of the system. The proposed bidirectional communication system can be extended to a multi-coupled communication system which meets a certain topological structure, and we speculate that with the increase of the dots in network, the complexity of the system increases.