When measuring the inclination of beam and slab, you can use a level meter to measure the inclination of beam and slab. The specific steps are as follows: first, you need to find a flat ground and put the level on the ground to make it completely horizontal. Place another elevation at the corresponding position of the perforated beam slab. Adjust the bubbles in the second stage and the first stage to the middle position to make them completely horizontal. Record the position of the bubble on the second benchmark, which is the inclination of the hole in the beam slab.