Hodgkin-Huxley equation describes the discharge activity of biological neural.Fitzhugh-Nagumo equation is a simplified model of Hodgkin-Huxley equation.The initial-boundary value problems of the Fitzhugh-Nagumo nerve conduction equation with inhomogeneous boundary conditions were discussed.The existence and uniqueness of the global solutions for the Fitzhugh-Nagumo equation with inhomogeneous boundary conditions was proved by means of the Galerkin method.The stability of Fitzhugh-Nagumo equation was analyzed by means of the Lyapunov stability theory.