**6. Conclusion**

Consequently, biosensor systems have been developing, the most important factors are selec‐ tivity and low cost. These specialties are very important of Point-Of-Care usage. Electrochem‐ ical impedance spectroscopy is very effective technique for label-free molecule detection. It can provide sensitivity, low cost and selective biosensor systems. As you can read from above, by using specific molecules such as DNA, Aptamer, Receptor, Antibody, Specific Proteins etc. it is possible to construct selective and sensitive impedimetric biosensor systems.
