Conducting polymers (CPs) represent a novel class of materials that combine the advantages of polymer production with the electrical characteristics of metals. They are very adaptable for a wide range of applications due to their tunable electrical, optical, and mechanical characteristics. The potential applications of conducting polymers (CPs) in a variety of domains, including biological and environmental, have led to a great deal of interest in their tuning. Researchers have significantly improved conductivity, stability, and biocompatibility by varying the polymer structure, doping levels, and incorporation of composite materials. CPs are used in anti-corrosion coatings, energy storage devices such as supercapacitors and batteries, and sensors that detect pollutants in the environment. They are perfect for these uses because of their capacity to interact with different chemical species and conduct electricity. CPs are utilized in drug delivery systems, biosensors, tissue engineering, in the biomedical industry. Their adjustable characteristics and biocompatibility provide precise control over drug release mechanisms and cell interactions. This chapter concludes with a discussion of CP tuning and its applications in biomedicine and the environment and their future aspects. Overall, the tuning of conducting polymers opens up new possibilities for creative solutions in both environmental and biomedical applications, leading the way for advanced technologies that tackle pressing global issues.