Abstract
Life Cycle Assessment (LCA) has been gradually considered for its effectiveness in evaluation of environmental impacts LCA assesses environmental impacts over the entire life cycle of any products, process, or activities. The research focused on the LCA evaluation of grid electricity thermal power plant and hydro power plant in Thailand. The power plant inventory database has been developed and LCA-NETS method is used to analyze environmental impact of power plants in Thailand. Assessments indicate power plant performance and propose possibility to reduce environmental effect. The results could be useful for further development of Eco-Power generation systems in Thailand.