TAPs (think aloud protocols), coming from introspection in psychology, is the main research method in translation empirical research. Based on the theory basis of TAPs, its research subject, using environment and experiment design, the paper divides its developmental history into three stages; then it introduces how to use TAPs (including environment and experiment design) and discusses the “advantages” and “disadvantages” in the past 30 years. The discussion mainly includes its high timeliness, subjectivity, completeness and the instructive function to the translation teaching as well as related negative ideas. In all, the introduction of TAPs provides new horizon for the translation research and is of high effectiveness in research on translator’s mind. TAPs provides us with great power in exploring the essence of translation process.