Detailed theoretical treatment and model calculations for describing the interaction between species and solid surface in the presence of a monochromatic electromagnetic field (laser field) throughout the chemisorption process, have been developed.Our theoretical treatment [1,2] for the scattering process in the presence of laser field and the well known Anderson model for atomic chemisorption [3,4] are the basis in deriving our theoretical treatment in the case of the chemisorption of the species on solid surface in the presence of laser field. The derived occupation number and the chemisorption energy are calculated as a function of laser parameters and as a function of normal distance from the surface as the adatom approaches to the surface. The model calculation is applied to the systems Na/W(111) and H/Cu(110) for their experimental and academic importance. Many important features are explained concerning the adatom charge state and the bonding type. From our results, one can conclude that the laser field is a tool of ionization , which is experimentally the truth.