Aimed at the problems that under condition of Underlay mode, the phenomenon of user frequency conflict interference may come out if the coverage is large with the satellite network, and the energy of mobile users in the satelliteground network is limited, in comprehensive consideration of the differences between the ground stations and mobile users among satellite users, this paper constructs a multiuser joint power control game model based on the spectrum of energy efficiency, and on the basis of the best response strategy and based on the game model proposed, a joint optimization algorithm (COAES) spectrum of energy efficiency effect is proposed, and the spectrum efficiency and effect factor are defined. Through the energy efficiency of different users playing with spectrum optimization requirements in terms of game theory, theory can prove its convergence to the Nash equilibrium. The simulation results show that the COAES algorithm can meet the needs of the spectral efficiency and the energy efficiency for different users, and the combined factor increases by 50% and 35% respectively, compared with the NETMA algorithm and the PRA algorithm.