A skin detection device, including a processor and a texture recognition sensor, is disclosed. The texture recognition sensor is configured to detect surface texture of skin to be detected； and the processor 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.
