The porous carbon derived from agricultural waste developed in this project possesses high biocompatibility and high conductivity, while also offering advantages of environmental friendliness and low cost. This will effectively promote the development of high power density microbial fuel cells and plant microbial fuel cells, achieving the goal of environmental sustainability. Among them, the plant microbial fuel cell devices are beneficial for integration applications in green buildings and homes. Moreover, since liquid ammonia is a highly energy-rich substance that readily decomposes into hydrogen for use in many green energy systems, it is relatively safer for energy transport compared to hydrogen, making it a potentially indispensable future energy source. The objective of this project is to utilize agricultural waste to prepare porous carbon and carbon quantum dots as electrode materials and additives for nitrogen-fixing green ammonia microbial electrolysis cells, combining optimal electricity-generating bacteria and nitrogen-fixing bacteria to create a microbial electrolysis cell system. This will enhance the yield of biological nitrogen fixation systems, contributing to addressing energy depletion and promoting sustainable development.