An identifiable plug and a plug assembly having the same are disclosed. The identifiable plug includes a power input port, a power output port, a storage unit, a signal transmission unit and a processing unit. The power output port is configured to insert into a plug of electronic equipment. The power input port is connected with the power output port. The processing unit is configured to transmit an identification information stored in the storage unit via the signal transmission unit. When the identifiable plug is assembled with an electric socket, the electric socket is capable to read the identification information.