This study aimed to evaluate the impact of a social service project for disadvantaged students through pretest-posttest study design and qualitative interviews. All students joining the service project were invited to participate in this study. Data on personal growth and academic performance (exam scores and class ranks) before and after joining the project were collected. Two focus group interviews were conducted to explore the strengths and limitations of the project. Paired t-test and generalized estimating equation model and content analysis were conducted to analyse quantitative and qualitative data, respectively. Results showed significant improvements in personal growth including self-esteem, academic performance, interpersonal relationship and personal goal setting (all p < 0.05); while exam scores and class ranks were not improved. 'Being empathic', 'self-awareness' and 'interpersonal relationship' emerged from the qualitative interviews as the strength of the project; short duration, lack of follow up and practical strategies in the service contents were concerned as limitations of the project. To conclude, this social service project was proven effective in empowering the personal growth of disadvantaged youth.