The invention relates to a method for analysing a surgical operation by endoscopy in an operation field in a space inside the body of an animal, characterised in that it comprises the steps of: detecting at least one tool (1, 2, 3) present in the operation field detecting at least one portion of an organ (4) in the vicinity of the detected tool (1, 2, 3) determining the position of the detected tool (1, 2, 3) relative to the detected organ (4) so that the detected tool (1, 2, 3), the detected portion of the organ (4) and their relative positioning form parameters defining a detected operation field selecting, in a database, a conceptual field of operation corresponding to the detected operation field based on the detected tool (1, 2, 3), the detected portion of the organ (4), and their relative positioning comparing the parameters of the detected field of operation with the parameters defining the selected conceptual field of operation in order to determine the deviations between said parameters providing information on the quality of the detected field of operation based on the determined deviations.
