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.本申請提供一種關節鏡系統,包括一關節鏡,具有一遠端方向與一近端方向、一光源接在關節鏡遠端方向上,用以提供光照、一鏡組,接在關節鏡的遠端方向上,用以收集光照、一影像感測元件,設置於鏡組旁,用以將收集之光照轉換為數位原始資料、一發射器,設置於遠端方向與近端方向之間,用於傳送數位原始資料至近端方向、一處理系統,接於近端方向,用於接收數位原始資料並轉為一數位影像資料;以及一影像播放裝置,用於播放數位影像資料。本申請另提供一種在關節鏡系統中傳送影像的方法。3‧‧‧關節鏡系統31‧‧‧關節鏡32PS‧‧‧處理系統33‧‧‧影像播放裝置311‧‧‧鏡組312‧‧‧光源315‧‧‧傳輸線3141‧‧‧影像感測元件3143‧‧‧發射器
