The utility model provides a water proof socket -outlet for electric power system, the utility model discloses a set up jack (4) and pressure switch (3) on socket ontology (2), set up buckler (1) on socket ontology's outer fringe face, set up pilot lamp (10) on the outer fringe face of buckler, the utility model discloses not only waterproof effect can be played, the effect that prevents the electric leakage can also be played, the demand that satisfies outdoor power consumption that can be better, the utility model has the characteristics of simple structure, convenient to use etc, not only be fit for using in the outdoor operation of electric power system, still be applicable to all trades and professions in outdoor power consumption operation etc..