The present application provides an arthroscopic system, which comprises an arthroscope having a distal end and a proximal end, a light source attached to the distal end of the arthroscope for providing a light, a lens attached to the distal end of the arthroscope for gathering the light, an image sensor set up next to the lens for generating digital raw data from the light, a transmitter set up between the distal end and the proximal end for transmitting the digital raw data toward the proximal end, a processing system attached to the proximal end for capturing and converting the digital raw data into digital video data and a video display device for displaying said digital video data. The present application eliminates the possibility of infecting the patient with contaminated devices by its cost-effectively disposable arthroscope. The present application also provides a method for image transmitting in an arthroscopic system.