Provided are methods and devices for transmitting or receiving Device-to-Device (D2D) broadcast information, and a transmission system. The method for transmitting the D2D broadcast information includes that: classification information of service information to be transmitted is acquired; control information corresponding to the classification information is acquired, wherein the control information is used for indicating resource scheduling information used during transmission and/or retransmission of the service information; and the service information and the control information are transmitted in a broadcast manner according to a preset rule.