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The realization of high-efficiency photocatalysis is greatly meaningful to overcome the issues of current energy and environment, in which the core factor is the exploration of photocatalysts with promising semiconductor properties. The Cu-based metal sulfide photocatalysts of CuSbS2and its derivative of bournonite CuPbSbS3possess the features of earth-abundant elements, strong photostability, visible-light range bandgap, and high absorption coefficient, possessing great potential for the realization of efficient photocatalytic applications. Although the photocatalysts of CuSbS2and CuPbSbS3have been investigated in photocatalysis application of hydrogen production and degradation, the exploration process is still in the early-development stage. In this review, the design concept and semiconductor properties of CuSbS2and CuPbSbS3are firstly introduced. Subsequently, the photocatalytic applications of CuSbS2and CuPbSbS3photocatalysts, mainly including hydrogen production and degradation, are systematically reviewed. Finally, the challenges and prospects for the further exploration of CuSbS2and CuPbSbS3photocatalysts are provided.