In this paper, the structural model for B_2O_3 galss has been studied theoretically by use of the EHMO theory in quantum chemistry. Based on the calculation results of the EHMO theory, a series of properties for B_2O_3 glass have been elucidated. All these show that the structural model suggested by Krogh-Moe is quite resonable, and the EHMO theory is feasible for studying th...