It is inevitable for any country to have people with disabilities or have trouble with standing up, especially arthritis patients. The most commonly used devices for disabled people are wheelchairs. What’s more, the life quality of disabled people and patients has caught attention by society. A modernized convertible wheelchair has become a popular engineering challenge for decades. We aimed to design a new mechanical system in the wheelchair to help people stand up as well as they can rest and sleep, this mechanism should be safer, simpler in structure, less power consuming and more economic. The structure is designed for the wheelchair to fit the natural human standing, sitting and sleeping posture. The standing and sleeping convertible wheelchair we will design may help people with disability to surge self-esteem; reach objects placed high, deliver a speech on a podium. By the way, it’s boring for a person to sit for a long time.