The group of disabled elderly people has gradually become the focus of social attention as the population is aging and getting older, especially the elderly with moderate to mild disability, most of this group has difficulty in completing standing and walking actions, such as getting in and out of bed, going to the toilet, walking indoors, etc. This paper designs a mobility device to meet the needs of the elderly to get in and out of bed and daily activities according to the difficulties of sitting, standing, squatting and walking of the elderly with moderate to mild disability. tracing automatic parking technology to safely realize the problem of obstacle avoidance and steering in narrow spaces such as bedside toilets.