Sports venue lighting device and sports venue lighting system

A sports venue lighting device comprises a back plate, a plurality of light-emitting bodies, a diffusion layer structure, a grating structure and a mounting rod. The back plate is provided with an accommodating part. And the plurality of luminous bodies are arranged in the accommodating part. One side of the diffusion layer structure covers the accommodating part. The grid structure is arranged on the other side of the diffusion layer structure and comprises a plurality of compartments, and each compartment is a cuboid. And the mounting rod is arranged on the back plate, so that the back plate can be locked on a ceiling through the mounting rod. After the light emitted by the plurality of luminous bodies of the sports venue lighting device passes through the diffusion layer structure and the grating structure, the light emitting angle is smaller than or equal to 45 degrees in the direction parallel to the short edge of the back plate, and is smaller than or equal to 77 degrees in the direction parallel to the