A communications system with smart agent robots includes a message interface, a first agent robot, a friend agent robot and a friend message interface. The message interface is used for inputting message data. The first agent robot is connected to the message interface for integrating and transceiving the message data automatically. The friend agent robot is connected to the first agent robot for communicating with the first agent robot. The friend message interface is connected to the friend agent robot for communicating with the first agent robot.