The utility model discloses a stealthy floor drain device and drainage system who puts including this place neglected loading, stealthy floor drain device includes stealthy floor drain, still including the cover body, evenly be equipped with a plurality of inlet openings on the cover body, stealthy floor drain is established cover body bottom, cover body top is equipped with the water inlet, be equipped with the filter screen on the water inlet, drainage system includes this stealth floor drain device. The utility model discloses install stealthy floor drain device in the mounting structure layer, evenly be equipped with the inlet opening on the cover body, with water through sub - drainage system exhaust simultaneously, can also discharge the ponding at mounting structure different position in the layer inlet opening on through the cover body, improve the drainability, can not produce the percolating water phenomenon.