A set of safety plugs and safety socket includes a two-pin plug, a three-pin plug, and a safety socket. The two-pin plug includes two two-pin plug outer plug bodies movably connected with each other. A two-pin plug self-locking column is movably connected with the two-pin plug outer plug bodies. A two-pin plug self-locking column sling groove and a hole accommodating a fastening nut are defined in the two-pin plug outer plug bodies. When a two-pin plug rotating tube is rotated counterclockwise, two-pin plug electrodes are pulled out of socket power supply sleeves, and the two-pin plug electrodes are retracted into an inner cavity of the two-pin plug. The two-pin plug rotating tube is continuously rotated to unlock the two-pin plug self-locking head, so the two-pin plug is separated from the safety socket. A use method of the three-pin plug is similar to that of the two-pin plug.