The longitudinal study purposively sampled and surveyed 448 elementary students in Taipei County in 2001 and managed the followed-up survey in 2003. By using two-wave dataset, the research attempted to examine the hypotheses proposed by Gotterfreson and Hirschi's general theory of crime. The result indicated that: (1) there was no significant effect of family structure and function on children's self-control; (2) self-control was an important predictor of child problem behaviors regardless of their family structure and function; (3) children's self-control (i. e. impulsivity, risk-taking, low-planning) was improvable in time.