Stimulated hot electron and its energy transport mechanism by a linearly-polarized laser interacting with a plasma are studied by using electromagnetic relativistic particle-in cell program simulation. The onset and nonlinear saturation process of electromagnetic instability are discussed. The state of transport of energy which is in the heat exchange with electron by the Spitzer-Harm theory is analyzed, electron′s vertical pyrogenation phenomenon that resulted from anisotropic heating of laser is observed. The result of this research indicates that the strong magnetic field excited by instability makes the electron beam deposit the energy within very short distance, meanwhile, restrain the electron therymal current to form when the laser ponderomotive force burst through the electron.