Psychological health is increasingly receiving attention in modern society, and online psychological counseling, as a convenient service method, has become increasingly popular. Psychological counseling is an important field of health, and with the continuous development of artificial intelligence technology, the application of robots in the field of psychological counseling has gradually attracted widespread attention. This paper aims to explore and implement an online psychological counseling robot system based on GPT-2. GPT-2 is a powerful natural language processing model, and its ability to generate text makes it an ideal choice for building intelligent dialogue systems. This study aims to design an efficient and intelligent online psychological counseling system by using the GPT-2 (GPT2 for Chinese tutoring) model to provide personalized and real-time psychological support.