Abstract
A robot control system using on-device AI includes an on-device AI control server to distribute a smaller Large Language Model (sLLM) for on-device AI execution; an on-device AI terminal to load and execute the sLLM distributed from the on-device AI control server; and a companion robot to carry out question asking and answering interaction with the sLLM running on the on-device AI terminal and make automated conversation with a user based on the question and answer. According to the robot control system and method using on-device AI, it may be possible to enable direct questioning/answering between the terminal and the robot by using the sLLM installed on each user's terminal without using LLM equipped on a platform, thereby solving the problem with network load caused by questions/answers, enhancing the optimized learning capabilities for each user, and increasing intimacy in conversation with the user.