Floodlight groove structure and building outdoor lighting system

The utility model discloses a floodlight groove structure and a building outdoor lighting system. The floodlight groove structure comprises a curtain wall plate, the curtain wall plate is provided with a decorative face, the decorative face is provided with a corner groove, the corner groove comprises a first side wall face and a second side wall face, the first side wall face is parallel to the decorative face, the second side wall face is perpendicular to the decorative face, and a pre-planting nail is arranged on the first side wall face; the first lamp groove comprises a lamp mounting plate and a fixed mounting plate, the fixed mounting plate is parallel to the first side wall surface, the fixed mounting plate is fixedly mounted on the first side wall surface through pre-planting nails, the lamp mounting plate is connected with the fixed mounting plate, the lamp mounting plate is arranged on the first side wall surface, and the lamp mounting plate is connected with the fixed mounting plate; the lamp mount