This work presents a Hybrid Model of indoor radiofrequency signal propagation and prediction to be applied to a wireless local area network environment. The wireless local area network environment Computer Aided Design prototype consists of a 1-floor area 25×110m2, with offices and classrooms and it was simulated using 914 MHz indoor radio frequency signals propagation. This new indoor Hybrid Model for a wireless local area network includes features based on the classical indoor communication models suggested by Seidel, Cheung, Honcharenko and International Telecommunication Union recommendation P.1238-9 (06/2017 updated) methods, for signal propagation and prediction methods, the planning of indoor radio communication systems and radio local area networks in the frequency range from 300 MHz to 100 GHz. The simulation of this hybrid model for indoor radio frequency signal propagation and prediction aims lower attenuation intensity and better quality of service of the radio frequency signal prediction and propagation. The features includes diffraction rays, exponent attenuation distance dependence, angle dependence attenuation factor and the diffraction coefficient for an absorbing wedge as suggested by the classical indoor prediction methods of Seidel, Cheung, Honcharenko and International Telecommunication Union Recommendation P.1238-9. As contribution and advantage of this hybrid model are case study of the Hybrid model, the facility in the method implementation, fast computational processing, lower signal attenuation and better accuracy of indoor radio frequency prediction results when compared with the classical methods indoor wireless local area network.