The invention relates to an obstacle crossing state analysis method. When an intelligent medical wheelchair is used and the height of an uphill in front of the wheelchair is larger than or equal to the maximum climbing height of the wheelchair itself, climbing difficulty signals are transmitted wirelessly, the wheelchair comprises a rear camera, the rear camera is arranged at the rear end of the wheelchair, real-time image acquisition is carried out when the rear camera faces the rear side of the wheelchair, and a real-time rear image is acquired and outputted; an LCD display device is arranged at the front end of the wheelchair and is connected with the rear camera for displaying the real-time rear image to the user of the wheelchair; a voice input device is arranged at the front end of the wheelchair for receiving the voice information inputted by the user of the wheelchair and converting the voice information inputted by the user of the wheelchair to a voice control instruction; and a wireless communication interface is connected with a remote mobile terminal of a relative of the user of the wheelchair for transmitting the abnormal wheelchair information to the remote mobile terminal of the relative of the user of the wheelchair through a two-way wireless communication link.