Psychological counseling has been highly valued by all walks of life, and the way of psychological consultation has a significant impact on the effect of psychotherapy. The psychological consultation between the Internet and reality has become important in the face of psychological counseling with the deepening of the research on the Internet plus mental health. This study was performed with the following aims: (1) examine the development of psychological counseling under the Internet environment, especially based on the current situation of psychological counseling in colleges and universities; (2) explore the painting psychological test and analysis method, its implementation path, and the classification and evaluation method of painting image based on decision tree algorithm; (3) design the "painting heart sound" painting psychological software system based on mobile Internet and software engineering technology; and put the "painting heart" painting psychology software system into practice.The sound painting psychological software system was applied in four cases. The practice results showed that the Internet plus psychological counseling had a great advantage in painting therapy, which was an effective way to do psychological counseling in colleges and universities, implement the "10 major educating people" system, and maintain the mental health of college students. The findings might help enrich psychological counseling channels and improve psychological consultation results.