The topic of environmental protection is become more and more popular, it is included: desertification, destruction of rainforest and pollution…etc; Nowadays the not topic is Green House Gases. Each country set up different fitted policies and supplementary measures. In Taiwan, the government will implement energy tax system at 2010; the purpose of this policy is to give consideration to save energy, finance and environmental protection. Energy tax is determined by user pay, the cost of user and safe energy, the taxation is adjusted the amount by 10 years, because the government let the public can accommodate to the new policy. Except the policy of energy tax, nowadays the policies are included: increasing the energy-efficiency, developing the green industries…etc. I used the CGE model (Computable General Equilibrium, CGE), energy formula, invest formula and moving anticipate formula to evaluate the economic and environment effects from different scenarios which consider multiple policies. In this thesis can found developing green industries is the best policy by face of economy, welfare and industries.