The invention discloses an 
endoscope device and 
system for treating gastroesophageal 
reflux disease and a control method of the 
endoscope device and 
system. The 
endoscope device comprises an insertionelement capable of being inserted into a 
stomach through an 
oral cavity, detection and calibration equipment and fixing equipment, wherein the 
insertion element is provided with a fixing section, andthe fixing section is connected with the top end of the 
insertion element through a 
guide tube; the top end of the 
insertion element folds part of tissue of 
stomach fundus to the 
gastroesophageal junction under the guidance of the 
guide tube to form an anti-
reflux tissue; the detection and calibration equipment is used for detecting the positions of the top end of the 
insertion element and the fixing section and checking whether the positions of the top end and the fixing section are matched or not; and the fixing equipment is used for fixing the anti-
reflux tissue after detecting that the top end of the 
insertion element is located at the 
gastroesophageal junction, the fixing section is located at the 
tail end of the 
esophagus and the top end is matched with the fixing section in position. The endoscope device can assist an operator in achieving accurate positioning of the endoscope device in the 
surgical operation process, an effective barrier for preventing gastroesophageal refluxis established, and therefore the purpose of resisting reflux is achieved.