As a part of social trust, media trust depends on individual perceptions of media behavior. This paper first explicates the concept of trust and its mechanism and then defines the concept of media trust as a compound of trust in media content, media professionals, and media organizations. Trust originates within a system and depends on the latter's attributes and processes. This paper delineates the differences between media trust and media credibility before further synthesizing credibility research methods, criteria, and categorization. The four major factors are source credibility, medium credibility, content credibility, and audience attributes. The paper also reviews credibility research in China, Hong Kong, and Taiwan before concluding with a discussion of the challenges and opportunities in this field.