Plant Microbial Fuel Cell or known as P-MFC, is an emerging technology to produce electricity. P-MFC is projected as a possible solution in developing an alternative source of electricity that is highly available and sustainable. P-MFC is not releasing pollution during the running time because the only side product of this technology is water (H2O). The national potential of P-MFC was calculated as much as 0,07 TW per year, which equal to 0,026% of national electricity production. The P-MFC designs for research purposes has already been variously created compare to the initial introduction. Besides, the plant type occupied has been diverse as well. This article reviews four main parts of P-MFC technology. Firstly, an explanation of fundamentals processes in P-MFC and its plant. Secondly, about the P-MFC design variations and its power output. Thirdly, about P-MFC power potential in Indonesia and lastly, about the challenge of P-MFC application.