Currently, with the consensus of the academia to add the mediation system when the Administrative Procedure Law is amended, the mediation scope of administrative cases is one of the most important problems to pinpoint. Based on the concept of administtative mediation, this paper analyzed the necessity and possibility of eatablishing the administrative litigation mediation system and introduced the scope of administrative litigation mediation which includes six categories, i.e . ,cases in which the statutory duties are not performed, cases of administrative discretion, cases in which the illegal administrative acts are revoked with other serious losses, cases in which the actual difficulties of the administrative counterpart need to be solved immediately, cases of administrative disputes in groups and cases of contract disputes.Finally, the procedures of running the mediation system is designed in a practical way.