The present invention provides a main body of an endoscopic device. The main body is connected with an endoscope. The main body includes a first surface with a screen, a second surface with a connecting portion, and a signal determining module electronically connected with the screen. The signal determining module receives a video signal from the endoscope and determines the type of the video signal. The video signal is transformed as digital information to be shown on the screen further.本發明提供一內視鏡主機,係連接於一內視鏡,該內視鏡主機包含一螢幕、一連接部以及一訊號判斷模組。該螢幕係位於該內視鏡主機之一第一面,該連接部係位於該內視鏡主機之一第二面,該訊號判斷模組電性連接於該螢幕。該訊號判斷模組會接收來自該內視鏡所取得之一影像訊號,並判斷該影像訊號之類型,進而使該影像訊號以一數位資訊顯示於該螢幕。20‧‧‧內視鏡主機210‧‧‧第一面211‧‧‧螢幕212‧‧‧輸入部220‧‧‧第二面221‧‧‧連接部223‧‧‧輔助支撐件227‧‧‧照明部230‧‧‧訊號判斷模組240‧‧‧訊號處理模組30‧‧‧數位影像式內視鏡
