A method for positioning an endoscope (60), characterized in that the method comprises the following steps: a) installing a robotic arm (10), wherein the robotic arm (10) defines a remote movement center； b) preparing an auxiliary positioning device (20), wherein the auxiliary positioning device (20) has a fixator (30), a coupling member (40) detachably connected to the fixator (30), and an orifice of receiving the apparatus (22) that passes through the fixator (30) and the coupling member (40), and installing the fastener (30) of the auxiliary positioning device (20) on the robotic arm (10), so that a terminal of the coupling member (40) of the auxiliary positioning device (20) coincides with the remote movement center of the robotic arm (10)； c) insert an endoscope (60) into the receiving hole of the apparatus (22) of the auxiliary positioning device (20), so that an endoscope terminal (60) aligns with the terminal of the coupling member (40) of the auxiliary positioning device (20)； d) remove the coupling member (40) from the auxiliary positioning device (20), so that the endoscope terminal (60) coincides with the remote movement center of the robotic arm (10)； and e) inserting the endoscope (60) into a catheter (14) that has been inserted into a body cavity (16).Un método para posicionar un endoscopio (60), que se caracteriza porque el método comprende los siguientes pasos: a) instalar un brazo robótico (10), en donde el brazo robótico (10) define un centro de movimiento remoto； b) preparar un dispositivo de posicionamiento auxiliar (20), en donde el dispositivo de posicionamiento auxiliar (20) tiene un fijador (30), un miembro de acoplamiento (40) conectado de manera desmontable al fijador (30), y un orificio de recepción del aparato (22) que pasa a través del fijador (30) y el miembro de acoplamiento (40), e instalar el fijador (30) del dispositivo de posicionamiento auxiliar (20) sobre el brazo robótico (10), de manera que un terminal del miembro de acoplamie
