An underground laid electric equipment container system, comprising: a buried box that is an outermost portion in lateral directions and downward direction of the underground laying type electric equipment container system and typically laid underground in the form of a manhole; a box holder that comprises a horizontal frame that is coupled to the upper surface of the buried box in an sealed state by filling a waterproof agent such as silicone in a coupling portion between the buried box and the box holder and an inner vertical frame that is upwardly bent from an inner edge of the horizontal frame; a cover, to which a waterproof band sealing the entire rectangular hole of the box holder and covering the entire upper portion of the inner vertical frame is attached to a lower surface of the cover, wherein coupling devices that allow adhesion between an upper portion of the inner vertical frame of the box holder and the waterproof band are installed on an upper surface of the horizontal frame of the box holder and the cover wherein upon separation of separable coupling devices of the coupling devices, the cover is rotatable around coupling devices that are permanently coupled, and an electric equipment box attached to a lower surface of the cover so as to be moved as a single body with the cover, characterized in that the electric equipment box is temporarily attached to the lower surface of the cover via coupling devices, whereby some of the coupling devices can be separated while some of the coupling are permanently coupled, so that a user is able to rotate the electric equipment box with respect to the coupling devices permanently fixed to the cover for accessing a user interface panel of the electric equipment box. a buried box that is an outermost portion in lateral directions and downward direction of the underground laying type electric equipment container system and typically laid underground in the form of a manhole; a box holder that comprises a horizontal frame that is coupled to the upper surface of the buried box in an sealed state by filling a waterproof agent such as silicone in a coupling portion between the buried box and the box holder and an inner vertical frame that is upwardly bent from an inner edge of the horizontal frame; a cover, to which a waterproof band sealing the entire rectangular hole of the box holder and covering the entire upper portion of the inner vertical frame is attached to a lower surface of the cover, wherein coupling devices that allow adhesion between an upper portion of the inner vertical frame of the box holder and the waterproof band are installed on an upper surface of the horizontal frame of the box holder and the cover wherein upon separation of separable coupling devices of the coupling devices, the cover is rotatable around coupling devices that are permanently coupled, and an electric equipment box attached to a lower surface of the cover so as to be moved as a single body with the cover, characterized in that the electric equipment box is temporarily attached to the lower surface of the cover via coupling devices, whereby some of the coupling devices can be separated while some of the coupling are permanently coupled, so that a user is able to rotate the electric equipment box with respect to the coupling devices permanently fixed to the cover for accessing a user interface panel of the electric equipment box.