Although life satisfaction is critical for adolescents' emotional, social, and educational functioning and positive development, social cognitive roles in adolescents' life satisfaction and potential underlying processes are less known. The present study aimed to explore the effect of implicit theories of intelligence on adolescent life satisfaction and their potential mechanisms. A moderated mediation model was constructed to investigate the mediating role of career exploration and the moderating role of career-specific parental support. Data were collected from 443 10th grade high-school students in Sichuan, China. Results revealed that career exploration fully mediated the positive relationship between implicit theories of intelligence and life satisfaction, while career-specific parental support moderated the relationship between career exploration and life satisfaction. These findings highlight the value of exploring social-cognition and career-related factors in life satisfaction.