Abstract: A safety easily operable universal adaptor which mainly disposed with a safety device and a set of shutter whereupon a control rod of the safety device is displaced toward the right and left in opposition to an up and down motion of a positioning block and then forcibly limited each plug pin to keep in position so as to enable only single set of the plug pin can be protruded outwardly; the set of shutter is disposed in the inner side of an socket of an adaptor body and then push the shutter away when a plug is inserted therein, so as to insert the socket and electrically connect to a electrically conductive plate therebetween; by virtue of this arrangement, an electrified state is formed between the plug and the plug pin.