The invention provides a self-service self-balancing electric multi-functional stair climbing wheelchair for the elderly, which includes a wheelchair body, the stair climbing wheelchair also includes a power transmission mechanism arranged under the seat of the wheelchair body, and a center of gravity adjustment mechanism located behind the back of the wheelchair body , and the active auxiliary stair-climbing device arranged at the front end below the wheelchair body seat, and the driven auxiliary stair-climbing device arranged at the rear end below the wheelchair body seat. The beneficial effects of the present invention are: the stair climbing wheelchair of the present invention utilizes the knowledge of mechanics, and designs a controllable adjustable seat height. It can maintain the original balance and make the elderly's going upstairs more safe and reliable; through the drive of the motor, it saves time and effort, has good stability, high safety, and is easy to use. It can well assist the elderly, weak, and disabled to relax upstairs.