As an interactional encounter between a journalist and one or more newsworthy public figures, an interview program is a special type of discourse that is full of evaluative language. This paper sets out to explore evaluation in interview programs from the perspective of appraisal system. The corpus software used in this study is UAM CorpusTool 3.3--annotating software that is able to automatically annotate the grammatical structure and parts of speech of the text, meanwhile allows manual annotation of linguistic features based on various schemes. The results show that the use of attitudinal resources is closely related to speaker's communication strategies. Invoked evaluation and positive appraisal resources are most frequently used in the interview to establish alignment with the audience. As will be explained below, the design of the program process and other information are also sources of evaluation.