Accompany with highly development of electronic technology and opening policies of financial management, criminal acts and fraud techniques that making use of credit cards by credit card fraud group are also renew continuously. The Counterfeit credit card crime created highest harm in variety of credit card fraud schemes and had been cost cardholders and issuers almost NT 70 hundred million in Taiwan from 2000 to 2002. This study is aimed to investigate criminal processes and criminal thinking patterns among offenders of credit card fraud group. In order to understand how cognitive structures make impacts on offenders' criminal acts deeply, research fellow use case study and in-depth interview as research ways to proceed empirical study with credit card fraud group offenders and other professionals.