The foci of this essay are to desuife complainant’s cognitive, evaluative, and trust orientation to complaints system and try to find the relationships between complainant’s social backgrounds and these three orientations. Complainant’s cognitive orientations are rather low. Sex, educational level, and economic status have significantly influenced complainant’s cognitive orientation. The living place has significantly related to complainant’s evaluative orientation. Sex, age, and native place have associated significantly to complainant’s trust orientation.