Chiral inorganic nanomaterials due to their unique asymmetric nanostructures have gradually demonstrated intriguing chirality-dependent performance in photo­(electro)­catalytic conversion, such as water splitting. However, understanding the correlation between chiral inorganic characteristics and the photo­(electro)­catalytic process remains challenging. In this perspective, we first highlight the chirality source of inorganic nanomaterials and briefly introduce photo­(electro)­catalysis systems. Then, we delve into an in-depth discussion of chiral effects exerted by chiral nanostructures and their photo-electrochemistry properties, while emphasizing the emerging chiral inorganic nanomaterials for photo­(electro)­catalytic conversion. Finally, the challenges and opportunities of chiral inorganic nanomaterials for photo­(electro)­catalytic conversion are prospected. This perspective provides a comprehensive overview of chiral inorganic nanomaterials and their potential in photo­(electro)­catalytic conversion, which is beneficial for further research in this area.