At present, single, middle-aged divorced, and empty nest elderly are the three major groups living alone. Living alone does give a lot of benefits, such as having one's own space and reducing interpersonal social activities. However, there are relatively many problems, and there are many accidents caused by living alone. Faced with the increasing number of people living alone, we know that the development potential of this issue is very high, and there will be greater demand in the future society.