A skin detection device (0), including a processor (01) and a texture recognition sensor (02), is disclosed. The texture recognition sensor (02) is configured to detect surface texture of skin to be detected； and the processor (01) is configured to determine surface smoothness of the skin to be detected according to the surface texture of the skin to be detected. The skin detection device can independently perform the health detection of the skin to be detected. A product information determination method, a product information determination device and a product information determination system are further disclosed.
