In the era of artificial intelligence, children's service robots will surely become one of the conventional hardware. This paper combines artificial intelligence technology and the space algorithm to design the child service robot system, improves the situational space perception algorithm, and applies the algorithm to the robot system. Moreover, this paper constructs the system structure of the children's service robot according to the actual needs and obtains the system function modules. In addition, this paper constructs a child service robot based on context perception and verifies the performance of the robot system. Finally, this paper combines the simulation experiment to carry out the interactive effect of the robot system and the service effect to children and investigates the satisfaction of parents. Through experimental research, it can be seen that the child service robot system based on situational awareness constructed in this paper has good service effects, can effectively take care of children, and has high parent satisfaction.