The present disclosure provides a communication method, communication device and a terminal, the communication method comprising: determining a PCell group or a PSCell group working on the unlicensed carrier by a terminal; and performing a RLM on the PCell group or the PSCell group; the PCell group or the PSCell group being established by selected from at least one serving cell working on the unlicensed carrier, each serving cell working on one unlicensed carrier. The technical solution can deploy a PCell group or a PSCell group in the unlicensed frequency band, to perform RLM on the PCell group or the PSCell group, a number of times of RLF is reduced, and it can avoided a problem of huge signaling overhead and throughput loss, caused by RRC Reestablishment or reconfiguration of the PSCell as RLF has been frequently detected in the unlicensed frequency band.