Legal scenario analysis poses significant challenges and consumes valuable time for legal professionals. To streamline this process, we present SIRAC, a revolutionary semi-structured reasoning model for legal scenario analysis. By incorporating the esteemed IRAC (Issue, Rule, Analysis, Conclusion) methodology, SIRAC automates and simplifies complex legal analysis. Its benefits extend beyond just junior lawyers and law students; SIRAC holds the potential to provide invaluable assistance to the general public in the future.