The invention relates to a robot system and a method thereof and solves the problems that on one hand, more ordinary families have difficulties in accepting a conventional robot which is high in price and on the other hand, the conventional robot is not high in practicability, lack of services, and can only realize simple voice interaction and but not actually solve the problems of users. According to the present market and technical basis, a service-oriented robot which can improve the public life quality is wanting, and the service-oriented robot does not need to have physical signs completely identical to people or anthropoid four limbs but can provide more humanized functions and services, such as how to solve the first-aid problem, the shopping problem, the household control problem, the door-to-door service problem and other demand problems for family members.