The significant challenge of wastewater generation is a global concern that necessitates mitigation through sustainable approaches. Identifying remedies before each unspoiled water reservoir succumbs to contamination resulting from the indiscriminate discharge of wastewater is crucial. Constructed wetlands integrated bio-electrochemical technologies (CW-BES) stand out as a recently devised sustainable technology that holds promise in addressing the challenge of wastewater treatment while concurrently facilitating the recovery of bioelectricity as a secondary byproduct. This chapter extensively delves into the intricacies of CW-BES, exploring their development, fundamental electron transfer mechanisms, various configurations such as constructed wetland integrated microbial fuel cells (CW-MFCs), MET lands, or electroactive wetlands employed to date, the diverse range of media/electrodes utilized, as well as the identified microbial diversification. The focus extends to comprehensively understanding the factors influencing CW-BES performance. Further, the chapter highlights the practical feasibility of deploying such sustainable technology in real-world applications on a larger commercial scale and the challenges associated with their implementation and operation. Finally, a techno-economic assessment of CW-BES technologies is discussed to evaluate the economic feasibility of scaling up these systems.