The utility model provides an electric elements mounting structure suitable for box room, connects on the corner post in box room, including socket, corner post package piece, wiring end box and an end box and the corner post package fastener of being connected of will working a telephone switchboard, the main part of corner post package piece is rectangle strip plate, and the left and right sides inside bending type of difference symmetry of main part becomes left crisperding and right crisperding, in the main part, have a hole along its major axis orientation is spaced apart, a pair of side of hole is rolled over to form respectively to the enstrophe perpendicularly and is connected the hem, wiring end box is pegged graft and is being connected between the hem, the hole outside in the main part is connected to the socket. The utility model provides an inconvenient, the technical problem that destroys wall structure of traditional directness install electric elements on wallboard time construction.