A significant development in Aceh's palm oil industry has not been accompanied by sound environmental management, resulting in several environmental problems, including an increase in greenhouse gases, the conversion of peatlands, and a decrease in biodiversity. Therefore, we need a systematic tool that can assess environmental impacts, one of which is the Life Cycle Assessment (LCA). The stages of the LCA are determining the objectives and scope, determining the Life Cycle Inventory (LCI), where all inflows and outflows are calculated with their respective quantities related to the functional unit, then determining the Life Cycle Impact Assessment (LCIA) at where the selected potential environmental impacts (as part of the objectives and scope) are measured using software or any other means of evaluation, and finally, do an interpretation, where the final results are analyzed, and the possible scenarios to be recommended are evaluated. The limitation of the system in this study is the gate to gate, which only covers the Palm Oil Mill. This research was started from the harvested Fresh Fruit Bunches (FFB) to produce palm oil. The results showed that palm shells are very suitable as fuel. The impact resource category gives the most dominant results with percentage of 81% compared to the other three impact categories in palm oil mills. The midpoint level impacts that most significantly contribute to the use of solid waste as alternative energy for generating electricity in palm oil mills are respiratory inorganics, terrestrial acidification and global warming. The best reduction in the impact of respiratory inorganics and terrestrial acidification was achieved 99% and 95% respectively, while the highest impact of global warming increased only 2,36%.