Abstract: The credibility is the main value basis for all citizens’ morality. And its cultivation should begin from childhood. Further, the credibility education of familial members will exert great influence on children. Nowadays, there exist problems as vague understanding of credibility, inappropriate education and inadequate examples in familial members. Therefore, familial members should make the credibility rules and accept willingly the award or penalty. In addition, they should set good examples for credibility in doing and being.