Photoelectrochemical sensor is a new kind of developing analytical device based on the photoelectrochemical properties of materials. Because of its remarkable sensitivity, inherent miniaturization, portability and easy integration, photoelectrochemical analysis is becoming a promising analytical technique. This review focuses on the basic principles, classification, characteristics, and research progress of photoelectrochemical sensors with 94 references. The prospect of the development of photoelectrochemical sensors is also evaluated and discussed.photoelectrochemistry, sensor, review