A method, system, and device for retransmitting data are provided. The method includes the following steps. In Step A, a receiving device detects a received frame that bears data, determines that the data frame is damaged, and judges whether the number of the damaged frames meets a set retransmission threshold value in a set range or not. If yes, Step B is performed. Otherwise, Step C is performed. In Step B, the receiving device sends a retransmission request to a sending device, the sending device retransmits the frame, and the process turns to Step A. In Step C, the receiving device performs a decoding processing on the data borne in the damaged frame that is received.